Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cac toc » cac toi, cac nuoc, cac thoi
van vat » van chat, nhan vat
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
toc va » hoc va, toc ta, tuc va
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 va cac toc va van vat ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu va cac toc va van vat ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu va cac toc va van vat ((cua tre) OR (cuu tre))*.