Perhaps you should try some spelling variations:
cong thuat » trong thuat, vuong thuat, cong thuc
thuat dung » thuat hung, thuat ung, thuat xung
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
doc hieu » toc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc thieu)) cach - thanh cong thuat dung cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) cach - thanh cong thuat dung cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc thieu)) cach - thanh cong thuat dung cong tan van ban*.