Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
ban hanh » ban hang
vu sach » vu bach, vu khach
cac tuc » cac toc, cac tu, cac tac
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
su sach » so sach
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
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: ((vu sach) or (su sach)) ky nang xa hoi. hieu ve cac tuc ((ban hanh) or (va thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ky nang xa hoi. hieu ve cac tuc ((ban hanh) OR (va thanh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) ky nang xa hoi. hieu ve cac tuc ((ban hanh) or (va thanh)) vi cua tre*.