Perhaps you should try some spelling variations:
hoc sach » hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
cam loc » cam lo
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
loc va » hoc va, luc va
vi cua » vai cua, di cua
x hoi » o hoi, x ho, 5 hoi

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 (hoc sinh)) y nang ((x hoi) or (xa hoi)). hieu van cam loc va thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc sinh)) y nang ((x hoi) OR (xa hoi)). hieu van cam loc va thanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc sinh)) y nang ((x hoi) or (xa hoi)). hieu van cam loc va thanh vi cua tre*".