Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
thu sach » tu sach, thuat sach, thuoc sach
viec cac » vien cac, viec cua, viec lam
cac cach » cai cach, cuoc cach, va cach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
cach va » cach van, sach va, cach ta
va nang » van nang, da nang, cam nang
hai cua » thai cua, dai cua, hoi cua
ha cua » hoa cua, nha cua, ham cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang ma hoa. hieu viec cac cach va nang ((ha cua) or (hai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ma hoa. hieu viec cac cach va nang ((ha cua) OR (hai cua)) te.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ma hoa. hieu viec cac cach va nang ((ha cua) or (hai cua)) te*.