Perhaps you should try some spelling variations:
chiet tach » chieu sach
truong cao » truong dai
nhung cong » dung cong, thong cong, hang cong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
trung cua » truong cua, trung tuan, trung cap
cong tan » cong tac, cong san, cong thanh
tan hang » tan khang, ban hang, van hang
hang cao » hoang cao, nang cao, hang ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - thanh ((trung cua) or (truong cao)) nhung cong tan hang cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - thanh ((trung cua) OR (truong cao)) nhung cong tan hang cao.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - thanh ((trung cua) or (truong cao)) nhung cong tan hang cao*.