Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
hieu hoa » tieu hoa, dieu hoa, hiep hoa
hieu hoc » lieu hoc, tieu hoc, hieu thuoc
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2

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: so sach v ((nang xa) OR (nang ma)) hoi. hien ((hieu hoc) OR (hieu hoa)) nuoc va danh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach v ((nang xa) OR (nang ma)) hoi. hien ((hieu hoc) or (hieu hoa)) nuoc va danh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: so sach v ((nang xa) OR (nang ma)) hoi. hien ((hieu hoc) or (hieu hoa)) nuoc va danh vai cua tre*.