Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
nhung cong » dung cong, thong cong, hang cong
trang va » tran van, hang va
cong tan » cong tac, cong san, cong thanh
tang va » tang van, thang va, tang vat
tan van » tran van, tang van, luan van

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