Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
ho chieu » theo chieu, hoc thieu, doi chieu
tran van » luan van
cong tac » cong ty
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu
lan van » luan van, lang van, tan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - hanh ((tran van) or (lan van)) trong cong tac ((than cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((tran van) OR (lan van)) trong cong tac ((than cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((tran van) or (lan van)) trong cong tac ((than cau) or (phan cau))*.