Perhaps you should try some spelling variations:
manh truong » manh trung, manh tuong, minh truong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
anh truong » anh thuong, anh trong, tang truong
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
tac vien » tai vien, tac viet, bac viet
hoc vien » hoc hien, hoc viet, hoc tieng

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - ((manh truong) or (anh truong)) cua nhung cong ((tac vien) OR (hoc vien)) huu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((manh truong) OR (anh truong)) cua nhung cong ((tac vien) OR (hoc vien)) huu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((manh truong) or (anh truong)) cua nhung cong ((tac vien) OR (hoc vien)) huu".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((manh truong) or (anh truong)) cua nhung cong ((tac vien) OR (hoc vien)) huu*.