Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
cua triet » cua viet, su triet, va triet
nang cho » nang chon, ngang cho, nang cao
cham cuc » cham cuu, pham cuc, pham chuc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cho hoc » co hoc, khoa hoc
hieu va » lieu va, hieu qua
va cham » va chat, va tham
cuc ban » cua ban, cac ban, cuu ban
cua tre » cua te, cuu tre, dua tren

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 cho hoc. hieu va cham cuc ban thanh tai ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang cho hoc. hieu va cham cuc ban thanh tai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang cho hoc. hieu va cham cuc ban thanh tai ((cua tre) OR (cua triet))*.