Perhaps you should try some spelling variations:
thuoc dieu » thuc dieu, hoc dieu, thuat dieu
dieu danh » dieu hanh, tieu danh, dia danh
hang cong » dang cong, hang nong, bang cong
tranh va » tranh van, trang va, trinh va
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than
va hang » van hang, 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: thuoc dieu danh - canh tranh va hang cong ((dan toan) or (dan than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc dieu danh - canh tranh va hang cong ((dan toan) OR (dan than)) ban*.