Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
va triet » va thiet, va trien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
pham duy » pham duc
duy van » duy vat, dung van
hieu vi » hieu voi, hieu va, hieu ve
tu cach » tu cac
tao hoi » tao khoi, tay hoi, thao hoc
bo sach » co sach, hoc sach
vi va » vi van, vai va, vu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (bo sach)) ky nang ((tao hoi) OR (tao boi)). hieu vi pham duy van thanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (bo sach)) ky nang ((tao hoi) OR (tao boi)). hieu vi pham duy van thanh vi va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (bo sach)) ky nang ((tao hoi) OR (tao boi)). hieu vi pham duy van thanh vi va triet".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (bo sach)) ky nang ((tao hoi) OR (tao boi)). hieu vi pham duy van thanh vi va triet*.