Perhaps you should try some spelling variations:
cuon sach » duong sach, cuoc cach, co sach
ban thanh » ban hanh, ban hang
cham tuc » nham thuc, pham thuc, tham thuc
va thanh » gia thanh, va tinh, le thanh
su sach » so sach, vu sach
vai cuu » vai cua
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (cuon sach)) ty nang xa hoi. hieu va cham tuc ((va thanh) OR (ban thanh)) vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (cuon sach)) ty nang xa hoi. hieu va cham tuc ((va thanh) OR (ban thanh)) vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (cuon sach)) ty nang xa hoi. hieu va cham tuc ((va thanh) OR (ban thanh)) vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (cuon sach)) ty nang xa hoi. hieu va cham tuc ((va thanh) OR (ban thanh)) vai cuu tre*.