Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
hoc thieu » toc thieu, hoc hien
nang cong » nang song, dang cong, bang cong
ho chieu » theo chieu, doi chieu, mot chieu
dung ung » dung cong
ung nang » dung nang, luong nang, dong nang
tac nhan » cac nhan, dac nhan, tan nhan
tao nhan » ca nhan, tue nhan, tri nhan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - thanh dung ung nang cong ((tac nhan) OR (tao nhan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) sach - thanh dung ung nang cong ((tac nhan) or (tao nhan)) cau~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) sach - thanh dung ung nang cong ((tac nhan) or (tao nhan)) cau*.