Perhaps you should try some spelling variations:
chiet tach » chieu sach
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
trinh va » trinh van, trinh vat, trinh ve
cong tac » cong ty
tac phan » tac pham, tai phan, tac phat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((lieu tinh) or (chiet tach)) - canh trinh va nhung cong tac phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((lieu tinh) OR (chiet tach)) - canh trinh va nhung cong tac phan tu.
• Adding a wildcard symbol may retrieve word variants: ho ((lieu tinh) or (chiet tach)) - canh trinh va nhung cong tac phan tu*.