Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
va triet » va thiet, va trien, ve triet
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cao duc » dao duc, cao suc, giao duc
vi va » vi van, vai va, vu va
tuan » quan, tran, luan

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty nang xa hoi. hieu va ((cao duc) or (cac du)) ((van thanh) or (tuan anh)) vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang xa hoi. hieu va ((cao duc) OR (cac du)) ((van thanh) OR (tuan anh)) vi va triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang xa hoi. hieu va ((cao duc) or (cac du)) ((van thanh) or (tuan anh)) vi va triet*.