Perhaps you should try some spelling variations:
thinh doan » chinh doanh, hinh toan, thi doan
cong thong » cong thuong, cong trong, dong thong
hieu lang » chieu sang, hieu quang, nhieu tang
hang cong » dang cong, hang nong, bang cong
toc hieu » toc thieu, doc hieu, hoc thieu
doan van » doan va, hoang van, luan van
van hang » van khang, van hoang, van thang
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu lang - thinh doan van hang cong thong ((phan dau) or (phan lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu lang - thinh doan van hang cong thong ((phan dau) OR (phan lap))*.