Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
hieu vu » hieu va, hieu ve, hieu su
doan vi » doan va, don vi, doan thi
va doan » va doanh, van doan, va dan
vu cham » va cham, vu kham, tu cham
cua tre » cua te, cuu tre, cua triet
ky sang » ky nang, ky dang, ky tang
me hoi » le hoi
sac ky » cac ky, sai ky
ma hoi » mai hoi, ma hoa, va hoi
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
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 sang ((((ma hoi) or (me hoi))) or (xa hoi)). hieu vu cham tuc va doan vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky sang ((((ma hoi) OR (me hoi))) OR (xa hoi)). hieu vu cham tuc va doan vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ((((ma hoi) or (me hoi))) or (xa hoi)). hieu vu cham tuc va doan vi cua tre*.