Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
cao xuc » cam xuc, cao duc, cao suc
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
xa hanh » xa thanh, xa khanh, va hanh
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
xuc xa » tuc xa, buc xa
va cao » va cac, va co, va dao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (lang xa)) hoi. hieu va cao xuc xa hanh ((vai cua) OR (hai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang xa) or (lang xa)) hoi. hieu va cao xuc xa hanh ((vai cua) OR (hai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (lang xa)) hoi. hieu va cao xuc xa hanh ((vai cua) OR (hai cua)) tre*.