Perhaps you should try some spelling variations:
thinh doan » chinh doanh, hinh toan, thi doan
cong thang » cong thanh, cang thang, cong thong
hieu lang » chieu sang, hieu quang, nhieu tang
dang cong » dung cong
toc hieu » toc thieu, doc hieu, hoc thieu
phan van » pham van, thanh van, luan van
va dang » van dang, va nang, va lang

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 va dang cong thang ((phan tu) OR (phan van))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc hieu lang - thinh doan va dang cong thang ((phan tu) OR (phan van))*".