Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hang cong » dang cong, hang nong, bang cong
trang va » tran van, hang va
cong van » cong vang, cong san, song van
van than » van thanh, van thang, van tuan
than cao » toan cao, thai cao, than cap
tang va » tang van, thang va, tang vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chuc nang) or (chieu xanh)) - hanh ((tang va) OR (trang va)) hang cong van than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chuc nang) OR (chieu xanh)) - hanh ((tang va) OR (trang va)) hang cong van than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chuc nang) or (chieu xanh)) - hanh ((tang va) OR (trang va)) hang cong van than cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chuc nang) or (chieu xanh)) - hanh ((tang va) OR (trang va)) hang cong van than cao*.