Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van cham » van chat, van tham, va cham
thanh di » thanh doi, thanh de, thanh do
hieu van » hieu va, thien van, lieu va
thuc va » thuc vat, thuc dan, thuc day
tu cach » tu cac
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
tuc va » truc va, tuc xa, duc 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: ((tu cach) or (thuoc sach)) ky nang xa hoi. hieu van cham ((tuc va) OR (thuc va)) thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thuoc sach)) ky nang xa hoi. hieu van cham ((tuc va) OR (thuc va)) thanh di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (thuoc sach)) ky nang xa hoi. hieu van cham ((tuc va) OR (thuc va)) thanh di cua tre*".