Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
cac hoc » cach hoc, cac hop, bac hoc
cua tre » cua te, cuu tre, cua triet
su sai » su tai, su hai, su dai
sai ky » sac ky
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ky nang xa hoi. ((hieu va) or (lieu va)) cac hoc va thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky nang xa hoi. ((hieu va) OR (lieu va)) cac hoc va thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sai ky nang xa hoi. ((hieu va) or (lieu va)) cac hoc va thanh vi cua tre*.