Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
hieu van » hieu va, thien van, lieu va
van anh » van thanh, tuan anh, van minh
anh dai » vanh dai, anh bai, anh dat
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu bac
tu san » thu san, tu ban, tu can
nam tu » nam thu, nam thuc
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 sac) or (tu san)) ky nang x hoi. hieu van ((nam thuoc) or (nam tu)) van anh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu san)) ky nang x hoi. hieu van ((nam thuoc) OR (nam tu)) van anh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu san)) ky nang x hoi. hieu van ((nam thuoc) or (nam tu)) van anh dai cua tre*.