Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
bieu hien » dieu hien, dieu khien, bien phien
thu sach » tu sach, thuat sach, thuoc sach
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo
ty nang » ky nang, ty xang, ty hang
cac tu » cac thu, cach tu, cac du
di cuu » di cau, di cua, dinh cuu
o hoc » co hoc, mo hoc, so hoc
x hoi » xa hoi, o hoi, x ho

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 ty nang ((x hoi) or (o hoc)). ((hieu viec) or (bieu hien)) cac tu va hanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang ((x hoi) OR (o hoc)). ((hieu viec) OR (bieu hien)) cac tu va hanh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang ((x hoi) or (o hoc)). ((hieu viec) or (bieu hien)) cac tu va hanh di cuu tre*.