Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
hoc sach » hoc sinh, hoc cac, hoc anh
nang xa » nang x, lang xa, nang ma
va tham » van tham, va cham, va thanh
hang di » hang doi, hang vi, hang dien
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
goc va » hoc va, loc va, doc va
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua

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) OR (hoc sach)) y nang xa hoi. lieu va tham ((goc va) or (luc va)) hang di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) y nang xa hoi. lieu va tham ((goc va) OR (luc va)) hang di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (hoc sach)) y nang xa hoi. lieu va tham ((goc va) or (luc va)) hang di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) OR (hoc sach)) y nang xa hoi. lieu va tham ((goc va) or (luc va)) hang di cua tre*.