Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
tung vat » dung vat, tang vat, luong vat
cong san » cong tac
san thai » sac thai, ban thai, van thai
thai cao » tai cao, thoai cac, thuat cao
tung va » trung va, tuong va, dung va

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

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