Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan tap » toan ban
tinh va » trinh van, trinh vat, tinh gia

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (chieu xanh)) - thanh ((tinh va) OR (tich va)) nhung cong van toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - thanh ((tinh va) OR (tich va)) nhung cong van toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu xanh)) - thanh ((tinh va) OR (tich va)) nhung cong van toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu xanh)) - thanh ((tinh va) OR (tich va)) nhung cong van toan tap*.