Perhaps you should try some spelling variations:
hoa hoi » khoa hoi, hoa hoc, hoa doi
hanh le » thanh le, hanh ve, hanh de
xuc van » duc van, luc van, vuc van
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ky tang » ky nang, ky dang, kho tang
san ky » sang ky, van ky, dan ky
ve cam » ve cham, ve cac, va cam
ha hoi » ha noi, xa hoi, va hoi
le cua » ly cua
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky tang ((ha hoi) or (hoa hoi)). hieu ve cam ((xuc van) or (suc manh)) hanh le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky tang ((ha hoi) OR (hoa hoi)). hieu ve cam ((xuc van) OR (suc manh)) hanh le cua tre.
• Adding a wildcard symbol may retrieve word variants: tu san ky tang ((ha hoi) or (hoa hoi)). hieu ve cam ((xuc van) or (suc manh)) hanh le cua tre*.