Perhaps you should try some spelling variations:
cong luong » cong thuong, nang luong, cong dong
hien tach » thien hach, chiet tach, vien bach
luong tai » dung tai, luong va
anh tang » anh bang, anh dang, anh sang
anh nang » ganh nang, anh bang, anh dang
tai doan » thai doan, tap doan, thi doan
doan ban » doanh ban, toan ban, doan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien tach - ((anh tang) or (anh nang)) cua cong luong tai doan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien tach - ((anh tang) OR (anh nang)) cua cong luong tai doan ban.
• Adding a wildcard symbol may retrieve word variants: hoc hien tach - ((anh tang) or (anh nang)) cua cong luong tai doan ban*.