Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hien xanh » hien hanh, hien nhanh, chieu xanh
dung cong » dung trong
trinh va » trinh van, trinh vat, trinh ve
dan than » dan chan, ban than, dan toan
van toan » van tuan, van tan, van thanh
van than » van thanh, van thang, van tuan
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - hanh trinh va dung cong ((((dan than) or (van toan))) or (van than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh trinh va dung cong ((((dan than) OR (van toan))) OR (van than)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh trinh va dung cong ((((dan than) or (van toan))) or (van than)) ban*.