Perhaps you should try some spelling variations:
tieu hanh » dieu hanh, tiem hanh, tien hanh
lanh bang » anh bang, lanh sang, can bang
hang cong » dang cong, hang nong, bang cong
anh sang » lanh sang, anh bang, anh dang
cong dan » cong san, cong tan, huong dan
va hang » van hang, va nang, va lang
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu hanh - ((lanh bang) or (anh sang)) va hang cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu hanh - ((lanh bang) OR (anh sang)) va hang cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: theo tieu hanh - ((lanh bang) or (anh sang)) va hang cong dan van ban*.