Perhaps you should try some spelling variations:
thuoc ban » thuoc tan, thuoc dang, thu ban
nha thuoc » nha nuoc, nhan thuc, nha hoc
hieu van » hieu va, thien van, lieu va
hang ke » thong ke, hanh kem, nhung ke
hang ve » hang va, hanh ve, hang vi
van nha » van nhan, van ha, ban nha
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cach tu » cach thuc
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: thuoc ((sach ky) or (cach tu)) nang xa hoi. hieu van nha thuoc ban ((hang ve) OR (hang ke)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ky) OR (cach tu)) nang xa hoi. hieu van nha thuoc ban ((hang ve) OR (hang ke)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach ky) or (cach tu)) nang xa hoi. hieu van nha thuoc ban ((hang ve) OR (hang ke)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ky) or (cach tu)) nang xa hoi. hieu van nha thuoc ban ((hang ve) OR (hang ke)) cuu tre*.