Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
thien anh » thien danh, thien thanh, thien chanh
tien anh » tieng anh, tien manh, dien anh
trinh ve » trinh he, trinh va, trinh vi
ve nhung » va nhung, tu nhung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (((thien anh) OR (tien anh)))) - hanh trinh ve nhung cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (((thien anh) OR (tien anh)))) - hanh trinh ve nhung cong tac toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (((thien anh) OR (tien anh)))) - hanh trinh ve nhung cong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (((thien anh) OR (tien anh)))) - hanh trinh ve nhung cong tac toan cao*.