Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
hoc sach » hoc sinh, hoc cac, hoc anh
thanh di » thanh doi, thanh de, thanh do
va thanh » gia thanh, ban thanh, va tinh
va tham » van tham, va cham, va thuat
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (thuoc sach)) ky nang x hoi. hieu ((ve cam) or (va tham)) luc va thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (thuoc sach)) ky nang x hoi. hieu ((ve cam) OR (va tham)) luc va thanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (thuoc sach)) ky nang x hoi. hieu ((ve cam) or (va tham)) luc va thanh di cua tre*.