Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
manh trung » manh tung, thanh trung, manh hung
lieu tinh » trieu tinh, diep tinh, bien tinh
nang cong » nang song, bang cong, hang cong
dang cong » dung cong
trung va » truong va, trang va, trung ha
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, 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 ((lieu tinh) or (chieu sach)) - manh trung va ((nang cong) OR (dang cong)) dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((lieu tinh) OR (chieu sach)) - manh trung va ((nang cong) OR (dang cong)) dan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((lieu tinh) or (chieu sach)) - manh trung va ((nang cong) OR (dang cong)) dan than cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((lieu tinh) or (chieu sach)) - manh trung va ((nang cong) OR (dang cong)) dan than cao*.