Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
doi chieu » doc hieu, doi chi, ho chieu
hanh tang » hanh trang, anh tang, hanh mang
cua thong » cua thuong, cua khong, cua tong
tang cua » mang cua, hang cua, tang luan
cong tan » cong tac, cong san, cong ty
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hien) or (doi chieu)) xanh - hanh tang cua thong ((cong thanh) or (cong tan)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (doi chieu)) xanh - hanh tang cua thong ((cong thanh) OR (cong tan)) toan ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (doi chieu)) xanh - hanh tang cua thong ((cong thanh) or (cong tan)) toan ban*.