Perhaps you should try some spelling variations:
cach thuoc » cach thuc, cay thuoc, cach thoi
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ve cach » va cach, ve cac, ve canh
lap cua » lai cua, tap cua, lam cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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 y nang x hoi. hieu ve cach thuoc ((va thanh) or (ban thanh)) lap cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu ve cach thuoc ((va thanh) OR (ban thanh)) lap cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu ve cach thuoc ((va thanh) or (ban thanh)) lap cua tre*.