Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu quang » thieu quang, hieu quan, hieu qua
canh trang » canh tranh, hanh trang, banh trang
cong vang » cong lang, cong quang, cong ngang
trang va » tran van, hang va
cong van » cong san, song van, cong tan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (hieu quang)) - canh trang va nhung ((cong van) or (cong vang)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (hieu quang)) - canh trang va nhung ((cong van) OR (cong vang)) toan cao.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (hieu quang)) - canh trang va nhung ((cong van) or (cong vang)) toan cao*.