Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
hang doanh » hanh doanh, nhung doanh, van doanh
nhung cong » dung cong, thong cong, hang cong
doanh va » doan va, doanh tai, doanh cua
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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 sang) OR (chieu sach)) - hang doanh va ((nhung cong) or (thong thong)) dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chieu sach)) - hang doanh va ((nhung cong) OR (thong thong)) dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) OR (chieu sach)) - hang doanh va ((nhung cong) or (thong thong)) dan toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) OR (chieu sach)) - hang doanh va ((nhung cong) or (thong thong)) dan toan tap*.