Perhaps you should try some spelling variations:
quan triet » quan tri, quan viet, quan tren
moi quan » mai quan, hai quan, co quan
va thanh » gia thanh, ban thanh, le thanh
trai ky » thai ky
va tinh » may tinh
te trai » te tai, te trau, te tri
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te trai ky nang ((ma hoi) or (ma hoa)). hieu ve cac tuc ((va thanh) or (va tinh)) moi quan triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te trai ky nang ((ma hoi) OR (ma hoa)). hieu ve cac tuc ((va thanh) OR (va tinh)) moi quan triet.
• Adding a wildcard symbol may retrieve word variants: te trai ky nang ((ma hoi) or (ma hoa)). hieu ve cac tuc ((va thanh) or (va tinh)) moi quan triet*.