Perhaps you should try some spelling variations:
luat duoc » luat tuc
thanh tai » thanh hai, thanh toan, doanh tai
hieu van » hieu va, thien van, lieu va
lam duoc » nam duoc, lam thuoc, tao duoc
hanh tai » hang tai, han tai, hinh tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
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 ky nang x hoi. hieu van ((lam duoc) or (luat duoc)) ban ((hanh tai) OR (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu van ((lam duoc) OR (luat duoc)) ban ((hanh tai) OR (thanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu van ((lam duoc) or (luat duoc)) ban ((hanh tai) OR (thanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu van ((lam duoc) or (luat duoc)) ban ((hanh tai) OR (thanh tai)) cua tre*.