Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
trinh vat » trinh van, trinh luat, sinh vat
dang cong » dung cong
tran chau » tranh chap, tran huu
ho chieu » theo chieu, hoc thieu, doi chieu
tran cau » toan cau, ran cau, tra cau

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 tinh - hanh trinh vat ((nhung cong) or (dang cong)) tan ((tran cau) or (tran chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - hanh trinh vat ((nhung cong) OR (dang cong)) tan ((tran cau) OR (tran chau)).
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - hanh trinh vat ((nhung cong) or (dang cong)) tan ((tran cau) or (tran chau))*.