Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
cua tre » cua te, cuu tre, cua triet
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
va cam » va cham, va cao, va cai
ha hoi » hoa hoi, ha noi, xa hoi
vi cua » vai cua, di cua

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 lang ha hoi. hieu ((va cam) OR (va cac)) xuc ((va hanh) or (va danh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang ha hoi. hieu ((va cam) OR (va cac)) xuc ((va hanh) OR (va danh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang ha hoi. hieu ((va cam) OR (va cac)) xuc ((va hanh) or (va danh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang ha hoi. hieu ((va cam) OR (va cac)) xuc ((va hanh) or (va danh)) vi cua tre*.