Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
vang thanh » van thanh, dang thanh, tang thanh
thanh chau » thanh cha, thanh cham, thanh chu
hieu xanh » chieu xanh, hieu manh, hieu nganh
cong vang » cong lang, cong quang, cong ngang
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 xanh - hanh trinh ((va thuong) or (he thong)) cong vang thanh chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh trinh ((va thuong) OR (he thong)) cong vang thanh chau*.