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
cuu tre » cua tre, cau tren, cau treo
ky tang » ky nang, ky dang, kho tang
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
ha hoi » ha noi, xa hoi, va hoi
le cuu » le cua, le huu, le cau
tu sac » tu sach, tu cac, tu san

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

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