Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
lang van » dang van, tang van, hoang van
cau treo » cau theo, cau tren, cau triet
lang xa » lang ha, dang xay
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
cau xuc » cam xuc, cau luc, cau truc
vai cau » van cau, vai cac, lai chau
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 cau treo~.
• 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 cau treo.
• 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 cau treo*.