Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
tac nhanh » tac thanh, tai nhanh, cach nhanh
ho chieu » theo chieu, hoc thieu, doi chieu
cua nang » chua nang, cua dang, cua hang
tac nhan » tao nhan, cac nhan, dac nhan
chuc » thuc, chu, chua

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 - thanh trung ((cua nang) or (chuc nang)) cong ((tac nhanh) or (tac nhan)) ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh trung ((cua nang) OR (chuc nang)) cong ((tac nhanh) OR (tac nhan)) ha.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh trung ((cua nang) or (chuc nang)) cong ((tac nhanh) or (tac nhan)) ha*.