Perhaps you should try some spelling variations:
vu sach » vu bach, vu khach
va dinh » van dinh, va kinh, va tinh
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
nang xa » nang x, lang xa, nang ma
su sach » so sach
cua tre » cua te, cuu tre, cua triet
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 va cac tuc ((va hanh) or (va dinh)) 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 va cac tuc ((va hanh) OR (va dinh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) ky nang xa hoi. hieu va cac tuc ((va hanh) or (va dinh)) vi cua tre*.