Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
te sach » toc sach
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
xuc va » duc va, tuc va, luc va
ve cac » va cac
cua te » cua tu

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 y ((nang xa) or (nang cao)) hoi. hieu ((ve cac) OR (vien cac)) xuc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (nang cao)) hoi. hieu ((ve cac) OR (vien cac)) xuc va hanh vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang xa) or (nang cao)) hoi. hieu ((ve cac) OR (vien cac)) xuc va hanh vi cua te*".