Perhaps you should try some spelling variations:
nay thuoc » cay thuoc, nam thuoc, na thuoc
vat thanh » dat thanh, gat thanh, viet thanh
tat thanh » tai thanh, ta thanh, tat thang
co sach » bo sach, cuon sach, hoc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va nay » va ngay, va cay
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ky nang xa hoi. hieu va nay thuoc ((vat thanh) or (tat thanh)) dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ky nang xa hoi. hieu va nay thuoc ((vat thanh) OR (tat thanh)) dai cua te.
• Adding a wildcard symbol may retrieve word variants: co sach ky nang xa hoi. hieu va nay thuoc ((vat thanh) or (tat thanh)) dai cua te*.