Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trang tham » trang thai, trang thach, trang trai
trang cham » trong cham, tranh chap, tran chau
nhung cong » dung cong, thong cong, hang cong
cong tan » cong tac, cong san, cong thanh
tan ran » tan tran, tan van, tan san
ran cau » van cau, ban cau, can cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (trieu tinh)) - hanh ((trang tham) OR (trang cham)) nhung cong tan ran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (trieu tinh)) - hanh ((trang tham) OR (trang cham)) nhung cong tan ran cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (trieu tinh)) - hanh ((trang tham) OR (trang cham)) nhung cong tan ran cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (trieu tinh)) - hanh ((trang tham) OR (trang cham)) nhung cong tan ran cau*.