Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
thuoc ban » thuoc tan, thuoc dang, thu ban
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
cua triet » cua viet, su triet, va triet
vu khach » vu khanh, vu khac, vay khach
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, dua tren
va nam » van nam, ha nam, va nay
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: ((vu khach) or (tu sach)) ky nang x hoi. lieu va nam thuoc ban thanh vai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (tu sach)) ky nang x hoi. lieu va nam thuoc ban thanh vai ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: ((vu khach) or (tu sach)) ky nang x hoi. lieu va nam thuoc ban thanh vai ((cua tre) or (cua triet))*.