Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
lieu tinh » trieu tinh, diep tinh, bien tinh
anh nang » ganh nang, anh bang, anh dang
va thong » va thuong, va phuong, he thong
cong tac » cong ty
toan cao » toan ban, toan tap
nang va » nang van, hang va, nang ma

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (lieu tinh)) - anh nang va thong ((cong san) OR (cong tac)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (lieu tinh)) - anh nang va thong ((cong san) OR (cong tac)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (lieu tinh)) - anh nang va thong ((cong san) OR (cong tac)) toan cao*.