Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
dai ban » dai han, di ban, doi ban
tai ban » tai san, tai ngan, tai benh
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu va cac ((dai ban) OR (tai ban)) thanh dai ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. hieu va cac ((dai ban) OR (tai ban)) thanh dai ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu va cac ((dai ban) OR (tai ban)) thanh dai ((cua tre) or (cua te))*.