Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang
nhieu tang » hieu lang, nhiet nang
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
toan ban » van ban
tung va » trung va, tuong va, dung va
ty toan » ly toan, tap toan, huy toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (((chieu sang) OR (nhieu tang)))) - thanh tung va nhung cong ty toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (((chieu sang) OR (nhieu tang)))) - thanh tung va nhung cong ty toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (((chieu sang) OR (nhieu tang)))) - thanh tung va nhung cong ty toan ban*".