Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
cham duc » pham duc, cham soc, pham duy
dai cuu » dai cua, dai huu
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
sach ky » sac ky, sach y, sach ty
te sach » toc sach
lang xa » dang xay, lang van
lang ha » long ha
cuu tre » cua tre, cau tren, cau treo

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 ky ((lang xa) or (lang ha)) hoi. hieu qua cham duc ((va hanh) or (va danh)) dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((lang xa) OR (lang ha)) hoi. hieu qua cham duc ((va hanh) OR (va danh)) dai cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((lang xa) or (lang ha)) hoi. hieu qua cham duc ((va hanh) or (va danh)) dai cuu tre*.