Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
truong ca » truong cao, trong ca, truong dai
truong va » truong dai, truong cao, truong dao
tan thanh » tran thanh, tang thanh, toan thanh
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh

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 - manh ((truong ca) or (truong va)) thong cong tan thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - manh ((truong ca) OR (truong va)) thong cong tan thanh san.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - manh ((truong ca) or (truong va)) thong cong tan thanh san*.