Perhaps you should try some spelling variations:
cuong van » duong van, luong van, cong van
muong van » duong van, luong van, muong va
theo yeu » theo tieu, thiet yeu, theo chu
anh nang » ganh nang, anh bang, anh dang
nang xay » dang xay, nganh xay, nang xuan
toan cau » toan cao, toan ban, toan tap
yeu tin » yeu tan, hieu tin, lieu tin

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo yeu tin - anh nang xay dung ((cuong van) or (muong van)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo yeu tin - anh nang xay dung ((cuong van) OR (muong van)) toan cau.
• Adding a wildcard symbol may retrieve word variants: theo yeu tin - anh nang xay dung ((cuong van) or (muong van)) toan cau*.