Perhaps you should try some spelling variations:
hieu cua » hieu qua, dieu cua, bieu cua
cac xuc » cam xuc, cac nuoc, chat xuc
va danh » va dinh, va dan, dia danh
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, ban hanh
cua cu » cua chu, cua cau, cua su
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
cu tre » cu tren, cua tre, cuu tre

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky ((nang xa) OR (nang ma)) hoi. hieu cua cac xuc ((va danh) or (va hanh)) cua cu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((nang xa) OR (nang ma)) hoi. hieu cua cac xuc ((va danh) OR (va hanh)) cua cu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky ((nang xa) OR (nang ma)) hoi. hieu cua cac xuc ((va danh) or (va hanh)) cua cu tre".
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((nang xa) OR (nang ma)) hoi. hieu cua cac xuc ((va danh) or (va hanh)) cua cu tre*.