Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
doanh cua » doanh luan
cua thong » cua thuong, cua khong, cua tong
thong van » trong van, thong va, thong quan
toan tap » toan ban
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: theo ((hieu lang) OR (chieu sang)) - hanh doanh cua thong thong van ((han tai) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (chieu sang)) - hanh doanh cua thong thong van ((han tai) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) OR (chieu sang)) - hanh doanh cua thong thong van ((han tai) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) OR (chieu sang)) - hanh doanh cua thong thong van ((han tai) or (toan tap))*.