Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hien xanh » hien hanh, hien nhanh, chieu xanh
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
van tuan » van quan, van ban, anh tuan
dan than » dan chan, ban than, van than

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 cua dung cong ((van tuan) or (dan than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh trinh cua dung cong ((van tuan) OR (dan than)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh trinh cua dung cong ((van tuan) or (dan than)) ban*.