Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
lang van » dang van, tang van, hoang van
vai cuu » vai cua
cau xuc » cam xuc, cau luc, cau truc
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
lang xa » lang ha, dang xay
va dan » ca dan, va dau, va dap
va dao » ca dao
va cau » van cau, va cac, va dau

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 ky ((lang xa) OR (lang van)) hoi. hieu va cau xuc ((va dan) or (va dao)) vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky ((lang xa) OR (lang van)) hoi. hieu va cau xuc ((va dan) OR (va dao)) vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky ((lang xa) OR (lang van)) hoi. hieu va cau xuc ((va dan) or (va dao)) vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky ((lang xa) OR (lang van)) hoi. hieu va cau xuc ((va dan) or (va dao)) vai cuu tre*.