Perhaps you should try some spelling variations:
nhiet tach » chiet tach
manh trung » manh tung, thanh trung, sinh trung
hoc nhiet » hoc thiet, hoc nghien, hoc hien
manh hung » anh huong
cong cong » cong dong, trong cong, dung cong
cong tac » cong ty
tran bai » toan bai, tran hai, trang tai
tran van » luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc nhiet tach - ((manh trung) OR (manh hung)) cua cong cong tac ((tran bai) or (tran van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nhiet tach - ((manh trung) OR (manh hung)) cua cong cong tac ((tran bai) OR (tran van))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc nhiet tach - ((manh trung) OR (manh hung)) cua cong cong tac ((tran bai) or (tran van))*".