Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc anh
cua tre » cua te, cua triet, dua tren
va dang » van dang, va nang, va lang
cao luc » bao luc, cao duc, cao suc
cuu tre » cau tren, cau treo
hoc cac » hoc cao
v nang » va nang, vu nang, van nang
luc va » duc va, tuc va, loc va
va cao » va cac, va co, va dao
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 cac)) v nang x hoi. lieu va cao luc va dang dieu ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc cac)) v nang x hoi. lieu va cao luc va dang dieu ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc cac)) v nang x hoi. lieu va cao luc va dang dieu ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) OR (hoc cac)) v nang x hoi. lieu va cao luc va dang dieu ((cua tre) or (cuu tre))*.