Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, mot chieu
tranh qua » tranh cua, thanh qua, tranh quang
trinh qua » trinh quan, trinh cua, trinh quang
cong tac » cong ty
tac tai » tac trai, tac thi, bac tai
tai cao » thai cao, tao cao, tai sao

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - canh ((tranh qua) OR (trinh qua)) trong cong tac tai cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - canh ((tranh qua) OR (trinh qua)) trong cong tac tai cao".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh ((tranh qua) OR (trinh qua)) trong cong tac tai cao*.