Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac
sai cua » dai cua, hai cua, lai cua
dan sai » danh sai, doan sai, dan tai
va chat » van chat, cao chat, hoa chat
hoc anh » hoc nganh, hoc nhanh, ngoc anh
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
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 (hoc anh)) ky nang x hoi. hieu ((va chat) OR (va phat)) xuc va dan sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc anh)) ky nang x hoi. hieu ((va chat) OR (va phat)) xuc va dan sai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (hoc anh)) ky nang x hoi. hieu ((va chat) OR (va phat)) xuc va dan sai cua tre*".