Perhaps you should try some spelling variations:
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
nang o » nang co, nang ho, nang ro
ve cam » ve cham, ve cac, va cam
xuc va » tuc va, xac va
luc va » tuc va, loc va
vi cua » vai cua, di cua
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang o hoi. hieu ve cam ((((xuc va) or (luc va))) or (duc va)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang o hoi. hieu ve cam ((((xuc va) OR (luc va))) OR (duc va)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac ky nang o hoi. hieu ve cam ((((xuc va) or (luc va))) or (duc va)) hanh vi cua tre*.