Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
thanh tung » thanh cong
cong toan » cong tan, cong hoan, cong tuan
toan hanh » toan thanh, toan anh, tran hanh
cap cang » cap bang, cap hoang, tap cong
hanh cac » hang cac, hanh cat, nhanh cay
cap can » cap han, cap van, tap can

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (chiet tach)) - thanh tung ((cap cang) or (cap can)) cong toan hanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chiet tach)) - thanh tung ((cap cang) OR (cap can)) cong toan hanh cac.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chiet tach)) - thanh tung ((cap cang) or (cap can)) cong toan hanh cac*.