Perhaps you should try some spelling variations:
luoc van » luoc can, luoc va, luc van
cua tre » cua te, cuu tre, cua triet
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
vi cua » vai cua, di cua
te sac » te sach, te cac, te san
luc va » duc va, tuc va, loc va
sac ky » cac ky, sai ky
me hoi » le hoi
ve cac » va cac, vien cac

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

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