Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
co sach » bo sach, cuon sach
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
ly dat » ly dai, ly dao, ly da
ly mat » ly may
vi cuu » vi luu, vinh cuu

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: ((co sach) OR (hoc sach)) y nang xa hoi. hieu ((ly dat) OR (ly mat)) nuoc va hanh vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((co sach) OR (hoc sach)) y nang xa hoi. hieu ((ly dat) or (ly mat)) nuoc va hanh vi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: ((co sach) OR (hoc sach)) y nang xa hoi. hieu ((ly dat) or (ly mat)) nuoc va hanh vi cuu tre*.