Perhaps you should try some spelling variations:
nhien cac » hien cac, thien cac, hieu cac
tu tieng » luc tieng, tu tuong, tu trong
hanh van » thanh van, khanh van, hanh san
vien cac » vien bach, vien dai, vien da
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hanh va » hang va, hanh vi
te sach » toc sach
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va

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) OR (hanh va)) tu 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) OR (hanh va)) tu 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) OR (hanh va)) tu 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) OR (hanh va)) tu tieng*.