Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
thang cap » thong cap, trung cap, hang ca
cong van » cong vang, cong san, song van
than cap » khan cap, thanh lap, thanh cac
tung va » trung va, tuong va, dung va

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