Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
ca thong » ca thuong, va thong, ca trong
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
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: hoc ((chieu sach) OR (chiet tach)) - ((minh hoang) or (hanh trinh)) ca thong cong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chiet tach)) - ((minh hoang) OR (hanh trinh)) ca thong cong tan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) OR (chiet tach)) - ((minh hoang) or (hanh trinh)) ca thong cong tan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) OR (chiet tach)) - ((minh hoang) or (hanh trinh)) ca thong cong tan than cau*.