Perhaps you should try some spelling variations:
cang thang » cong thanh, dang thanh
doi chieu » doc hieu, doi chi, mot chieu
thang tai » hang tai, tang tai, thanh tai
tai nhung » thai nhung, thi nhung, tai hung
ho chieu » theo chieu, hoc thieu, mot chieu
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
thi cao » thai cao, thi hao, thi bao

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) or (doi chieu)) sach - cang thang tai nhung ((cong dan) or (cong san)) thi cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - cang thang tai nhung ((cong dan) OR (cong san)) thi cao.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) sach - cang thang tai nhung ((cong dan) or (cong san)) thi cao*.