Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hieu viec » nhieu viec, hieu ve, sieu viet
van hanh » ban hanh, van anh, van ban
vinh cua » sinh cua, dinh cua, vinh cuu
tinh cua » trinh cua, sinh cua, tinh chat
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
viec da » viec dat, vien da, viec va
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 ky nang ma hoi. hieu viec da xuc ((van thanh) or (van hanh)) ((vinh cua) OR (tinh cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu viec da xuc ((van thanh) OR (van hanh)) ((vinh cua) OR (tinh cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoi. hieu viec da xuc ((van thanh) or (van hanh)) ((vinh cua) OR (tinh cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. hieu viec da xuc ((van thanh) or (van hanh)) ((vinh cua) OR (tinh cua)) tre*.