Perhaps you should try some spelling variations:
tang thanh » dang thanh, trung thanh, hoang thanh
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » chieu sang, hieu quang, nhieu tang
tan thanh » tran thanh, toan thanh, ban thanh
doc hieu » toc thieu, hoc thieu, hoc hien
cua hang » cua dang, cua nhung, cua ban

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 lang - hanh tranh ((cua hang) or (cua cong)) cong ((tan thanh) OR (tang thanh)) chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu lang - hanh tranh ((cua hang) OR (cua cong)) cong ((tan thanh) OR (tang thanh)) chau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu lang - hanh tranh ((cua hang) or (cua cong)) cong ((tan thanh) OR (tang thanh)) chau".
• Adding a wildcard symbol may retrieve word variants: doc hieu lang - hanh tranh ((cua hang) or (cua cong)) cong ((tan thanh) OR (tang thanh)) chau*.