Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
tang chua » tang cua, tranh chua, tang khu
nang cong » nang song, dang cong, bang cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
tang ha » lang ha, tang ma, trung ha

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) or (trieu tinh)) - anh ((tang chua) OR (tang ha)) nang cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (trieu tinh)) - anh ((tang chua) OR (tang ha)) nang cong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (trieu tinh)) - anh ((tang chua) OR (tang ha)) nang cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (trieu tinh)) - anh ((tang chua) OR (tang ha)) nang cong dan toan cau*.