Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu tinh » chieu tinh, lieu tinh, kieu tinh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong dang » cong dan, cong dung, cong danh
tran chau » tranh chap, tran huu
doc hieu » toc thieu, hoc thieu, hoc hien

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu tinh - hanh tranh cua nhung ((cong dang) or (cong dong)) tran chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu tinh - hanh tranh cua nhung ((cong dang) OR (cong dong)) tran chau.
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - hanh tranh cua nhung ((cong dang) or (cong dong)) tran chau*.