Perhaps you should try some spelling variations:
hieu cua » hieu qua, dieu cua, bieu cua
va hanh » van hanh, va thanh, va danh
va tinh » may tinh
cac xuc » cam xuc, cac nuoc, chat xuc
cuu tre » cua tre, cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky
ca cuu » cap cuu, cua cuu, ca cua

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