Perhaps you should try some spelling variations:
vat thanh » dat thanh, gat thanh, tat thanh
cach thuc » anh thuc, cac thu
nang van » dang van, tang van, lang van
thanh vi » hanh vi, thanh va, thanh ve
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
te sach » toc sach
hieu va » lieu va, hieu qua
va cach » va cac
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (te sach)) ky nang van hoa. hieu va cach thuc vat thanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) ky nang van hoa. hieu va cach thuc vat thanh vi su triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) ky nang van hoa. hieu va cach thuc vat thanh vi su triet*.