Perhaps you should try some spelling variations:
thong dung » thong cong, thong thuong
hoc thieu » hoc hien
tac thong » tac thuong, tac trong, tac chong
cong tac » cong ty
dung dat » dung va, dung tai
dat khan » dat khanh, dat thanh, bat khanh
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (toc thieu)) cach - thanh cong tac thong dung dat khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) cach - thanh cong tac thong dung dat khan cap*.