Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
hieu hien » bieu hien, dieu hien, chieu chien
va thanh » gia thanh, ban thanh, va tinh
cac dat » cac dan, cai dat, cac dai
va hanh » van hanh, va danh, ban hanh
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
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: tu sach y nang x hoi. ((hieu viec) or (hieu hien)) cac dat ((va hanh) OR (va thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. ((hieu viec) OR (hieu hien)) cac dat ((va hanh) OR (va thanh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. ((hieu viec) or (hieu hien)) cac dat ((va hanh) OR (va thanh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. ((hieu viec) or (hieu hien)) cac dat ((va hanh) OR (va thanh)) vi cua tre*.