Perhaps you should try some spelling variations:
luoc van » luoc can, luoc va, luc van
te sach » toc sach
xuc van » duc van, luc van, vuc van
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, ma hoa, me hoi
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: te sach ky nang ((ma hoi) OR (mai hoi)). hieu ve cham ((xuc van) or (luoc van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((ma hoi) OR (mai hoi)). hieu ve cham ((xuc van) OR (luoc van)) hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((ma hoi) OR (mai hoi)). hieu ve cham ((xuc van) or (luoc van)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((ma hoi) OR (mai hoi)). hieu ve cham ((xuc van) or (luoc van)) hanh vi cua tre*.