Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
tac nhanh » tac thanh, tai nhanh, cach nhanh
ho chieu » theo chieu, hoc thieu, doi chieu
khang cu » khung cua, thang cua, chung cu
khan cua » nhan cua, than cua, han cua
tac nhan » tao nhan, cac nhan, dac nhan

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 sach - hanh ((khang cu) or (khan cua)) dung cong ((tac nhan) or (tac nhanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((khang cu) OR (khan cua)) dung cong ((tac nhan) OR (tac nhanh)) cao.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((khang cu) or (khan cua)) dung cong ((tac nhan) or (tac nhanh)) cao*.