Perhaps you should try some spelling variations:
thuoc tuan » thuoc tan, thuoc luan, phuoc thuan
nam thuoc » nam thuc, nam thu, nha thuoc
tu cach » tu cac
hieu va » lieu va, hieu qua
hieu ve » hieu van
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
anh va » hanh va
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) ky nang xa hoi. ((hieu ve) or (hieu va)) nam thuoc tuan anh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky nang xa hoi. ((hieu ve) OR (hieu va)) nam thuoc tuan anh va cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky nang xa hoi. ((hieu ve) or (hieu va)) nam thuoc tuan anh va cua tre*.