Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
thi hanh » thi thanh
vat hang » van hang, dat hang, mat hang
hanh nam » thanh nam, hanh lam, hanh ngay
ve triet » va trien, su triet
va hang » van hang, va nang, va lang
tu sach » thu sach, su sach, te sach
v nang » va nang, vu nang, van nang
y nang » ky nang, ly nang, may nang
di ve » dai ve, de ve, do ve

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) xa hoi. thi hanh nam thuoc ((vat hang) OR (va hang)) di ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) or (v nang)) xa hoi. thi hanh nam thuoc ((vat hang) OR (va hang)) di ve triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (v nang)) xa hoi. thi hanh nam thuoc ((vat hang) OR (va hang)) di ve triet*.