Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
ho chieu » theo chieu, hoc thieu, doi chieu
dung vat » dung va, dong vat, dung dat
vat dung » van dung, va dung, viet dung
cong tac » cong ty
thai cao » tai cao, thoai cac, thuat cao
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chi)) sach - thanh dung vat dung ((cong san) OR (cong tac)) thai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chi)) sach - thanh dung vat dung ((cong san) OR (cong tac)) thai cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chi)) sach - thanh dung vat dung ((cong san) OR (cong tac)) thai cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chi)) sach - thanh dung vat dung ((cong san) OR (cong tac)) thai cao*.