Perhaps you should try some spelling variations:
ban hanh » ban hang
te sach » toc sach
vai cuu » vai cua
va hanh » van hanh, va thanh, va danh
sach tu » sach thu, cach tu, sach ty
hieu va » lieu va, hieu qua
lang ha » long ha
lang xa » dang xay, lang van
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tu ((lang xa) or (lang ha)) hoi. hieu va cam xuc ((va hanh) or (ban hanh)) vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu ((lang xa) OR (lang ha)) hoi. hieu va cam xuc ((va hanh) OR (ban hanh)) vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach tu ((lang xa) or (lang ha)) hoi. hieu va cam xuc ((va hanh) or (ban hanh)) vai cuu tre*.