Perhaps you should try some spelling variations:
nhien cac » hien cac, thien cac, hieu cac
vien cac » vien bach, vien dai, vien da
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va
van tu » van thu, ban tu, van tuan
van du » van duy, van dau, van de

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 nang ma hoi. thien ((nhien cac) or (vien cac)) xuc va hanh ((van tu) OR (van du)) tieng~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. thien ((nhien cac) OR (vien cac)) xuc va hanh ((van tu) OR (van du)) tieng.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. thien ((nhien cac) or (vien cac)) xuc va hanh ((van tu) OR (van du)) tieng".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. thien ((nhien cac) or (vien cac)) xuc va hanh ((van tu) OR (van du)) tieng*.