Perhaps you should try some spelling variations:
luoc van » luoc can, luoc va, luot van
cua tre » cua te, cuu tre, cua triet
luc van » luu van, duc van, luc va
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
te cach » ve cach, te sach, tu cach
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua
te cac » tu cac, ve cac, te cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te cac) or (te cach)) ky nang ma hoi. hieu ve cham ((luoc van) OR (luc van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cac) OR (te cach)) ky nang ma hoi. hieu ve cham ((luoc van) OR (luc van)) hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te cac) or (te cach)) ky nang ma hoi. hieu ve cham ((luoc van) OR (luc van)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te cac) or (te cach)) ky nang ma hoi. hieu ve cham ((luoc van) OR (luc van)) hanh vi cua tre*.