Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong tac » thong cac, tuong tac, thong tai
ho chieu » theo chieu, hoc thieu, doi chieu
trung ha » trung hoc, trung tam, trung cap
tran van » luan van
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap

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 - thanh ((trung ha) or (tran van)) thong thong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((trung ha) OR (tran van)) thong thong tac than cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trung ha) or (tran van)) thong thong tac than cau*.