Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
te sach » toc sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ve cac » va cac
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ((ve cac) OR (vien cac)) tuc va hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. hieu ((ve cac) OR (vien cac)) tuc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. hieu ((ve cac) OR (vien cac)) tuc va hanh vi cua tre*.