Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
sach tran » sach tranh, sach tren, vach tran
quang khi » quang khai, quang chi, quang thi
sach tien » sach tren, sach thieu
cong tac » cong ty
cong hai » cong thai, cong ha, hoang hai
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach tran quang khi đong luc ) or ( thuat sach tien ((cong tac) or (cong hai)) đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tran quang khi đong luc ) OR ( thuat sach tien ((cong tac) OR (cong hai)) đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tran quang khi đong luc ) or ( thuat sach tien ((cong tac) or (cong hai)) đong luc ))*.