Perhaps you should try some spelling variations:
canh thanh » canh tranh, danh thanh, anh thanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong vang » cong lang, cong quang, cong ngang
vang tuan » van tuan, vong tuan, quang tuan
hoc hieu » hoc thieu, hoc hien, doc hieu
san bang » san sang, gan bang, san bong
can bang » cao bang, can ban, van ban
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - canh thanh ((san bang) or (can bang)) cong vang tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - canh thanh ((san bang) OR (can bang)) cong vang tuan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - canh thanh ((san bang) or (can bang)) cong vang tuan cau*.