Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
nhanh lang » nhanh quang, nhanh thang, nhan dang
thong tac » thong cac, tuong tac, thong tai
va thong » va thuong, va phuong, he thong
tac hang » tac vang, bac thang, tac chong
hang cau » hang dau, hang ca, nhung cau
lang va » lang van, hang va, lang ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chieu tinh)) - nhanh lang va thong thong tac hang cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu tinh)) - nhanh lang va thong thong tac hang cau*.