Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nuoc van » nuoc va, nuoc san, luoc van
van dang » van dong, van dung, van nang
dang tri » dang thi, dung tri, dong tri
nang xa » nang x, lang xa, nang ma
van bac » van ban, van bao, dan bac
van hac » van hoc, van ha, van hai
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach y nang xa hoi. thi ((van bac) OR (van hac)) nuoc van dang tri cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y nang xa hoi. thi ((van bac) OR (van hac)) nuoc van dang tri cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang xa hoi. thi ((van bac) OR (van hac)) nuoc van dang tri cua tre*.