Perhaps you should try some spelling variations:
"nhung thoi quen van. boi dung hoc moiit" » "nhung thi quen van. boi dung hoc moiit", "phung thi quen van. boi dung hoc moiit", "nhung loi quen van. boi dung hoc moiit", "nhung thoi quen van. boi dung hoc moi", "nhung thoi quen van. boi dung hoc mot", "nhung thoi quyen van. boi dung hoc moiit", "nhung thoi quan van. boi dung hoc moiit", "nhung thoi que van. boi dung hoc moiit", "nhung thoi quen van. boi duong hoc moiit", "nhung thoi quen van. noi dung hoc moiit", "nhung thoi quen van. hoi dung hoc moiit", "nhung thoi quen van. boi dong hoc moiit", "nhung thoi quen van. boi dung thuoc moiit", "nhung thoi quen van. boi trung hoc moiit", "nhung thoi quen van. boi dung hoc moiiit", "nhung thoi quen van. boi dung hoc motiit", "nhung thoi quen van. boi dung hoc moniit"
"nhung bai quyet van. moi truong hoc mo" » "nhung bai quyet van. moi trung hoc mo", "nhung bai quyet van. moi tuong ho mo", "nhung bai quyet van. moi truong bo mo", "nhung bi quyet van. moi truong hoc mo", "nhung ban quyet van. moi truong hoc mo", "nhung giai quyet van. moi truong hoc mo", "nhung bai quyet van. moi truong hoc moi", "nhung bai quyet van. moi truong hoc mot", "nhung bai quyet van. moi truong hoc mon"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("nhung thoi quen van. boi dung hoc moiit") or ("nhung bai quyet van. moi truong hoc mo"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("nhung thoi quen van. boi dung hoc moiit") OR ("nhung bai quyet van. moi truong hoc mo")).
• Removing quotes may allow a broader search: (( nhung thoi quen van. boi dung hoc moiit ) or ( nhung bai quyet van. moi truong hoc mo )).
• Adding a wildcard symbol may retrieve word variants: (("nhung thoi quen van. boi dung hoc moiit") or ("nhung bai quyet van. moi truong hoc mo"))*.