Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, duc va
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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 y nang x hoi. hieu ve cam ((tuc va) OR (tuc xa)) hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang x hoi. hieu ve cam ((tuc va) OR (tuc xa)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang x hoi. hieu ve cam ((tuc va) OR (tuc xa)) hanh vi cua tre*.