Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
hoc thieu » toc thieu
dung cong » dung trong
van thanh » ban thanh, van tuan
thanh cac » hanh cac, thanh bac, thanh ca
cong van » cong vang, cong san, song van
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 thieu) or (hoc hien)) xanh - ((hanh trinh) OR (canh tranh)) va dung cong van thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) xanh - ((hanh trinh) OR (canh tranh)) va dung cong van thanh cac*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (hoc hien)) xanh - ((hanh trinh) OR (canh tranh)) va dung cong van thanh cac*".