Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
dinh ve » dinh ket, dinh van
truc va » thuc va, thuc vat, trung va
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
so sanh » do sanh
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
ve cua » le cua, de cua, te 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 (so sanh)) ky nang xa hoi. hieu va cam ((luc va) or (truc va)) dinh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (so sanh)) ky nang xa hoi. hieu va cam ((luc va) OR (truc va)) dinh ve cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (so sanh)) ky nang xa hoi. hieu va cam ((luc va) or (truc va)) dinh ve cua tre*.