Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hanh doanh » hang doanh, chinh doanh, doanh doanh
thong cong » tong cong, thong thong, phong chong
hieu lang » hieu quang, nhieu tang, hieu van
doanh cua » doanh luan
san han » san phan, san van, van han
han tai » hang tai, nhan tai, van tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thien ((hieu lang) or (chieu sang)) - hanh doanh cua ((thong cong) OR (trong cong)) san han tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thien ((hieu lang) OR (chieu sang)) - hanh doanh cua ((thong cong) OR (trong cong)) san han tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thien ((hieu lang) or (chieu sang)) - hanh doanh cua ((thong cong) OR (trong cong)) san han tai".
• Adding a wildcard symbol may retrieve word variants: thien ((hieu lang) or (chieu sang)) - hanh doanh cua ((thong cong) OR (trong cong)) san han tai*.