Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh trang » thanh trung, canh tranh, hanh trinh
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
cong san » cong tac
san than » sang than, san thanh, ban than
than cao » toan cao, thai cao, than cap

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 sang)) - ((hanh trang) or (thanh tung)) va nhung cong san than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - ((hanh trang) OR (thanh tung)) va nhung cong san than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chieu sang)) - ((hanh trang) or (thanh tung)) va nhung cong san than cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chieu sang)) - ((hanh trang) or (thanh tung)) va nhung cong san than cao*.