Perhaps you should try some spelling variations:
diem cau » dieu can
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
di cau » da cau
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao

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 sac ky ((nang xa) OR (lang xa)) hoi. hieu va cam duc va hanh ((di cau) OR (diem cau)) tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang xa) OR (lang xa)) hoi. hieu va cam duc va hanh ((di cau) or (diem cau)) tren~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) OR (lang xa)) hoi. hieu va cam duc va hanh ((di cau) or (diem cau)) tren*.