Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
van thanh » ban thanh, van tuan
sinh cua » manh cua, dinh cuu, sinh va
van hanh » ban hanh, van anh, van ban
tu sach » thu sach, su sach, tu cach
viec da » viec dat, vien da, viec va
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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) OR (te sach)) ky nang ma hoi. hieu viec da xuc ((van thanh) or (van hanh)) sinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang ma hoi. hieu viec da xuc ((van thanh) OR (van hanh)) sinh cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky nang ma hoi. hieu viec da xuc ((van thanh) or (van hanh)) sinh cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky nang ma hoi. hieu viec da xuc ((van thanh) or (van hanh)) sinh cua tre*.