Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach tu, sach thu
va hanh » va thanh, va danh, ban hanh
cam tuc » cam xuc, cam tu, nam thuc
te sach » toc sach
nang xa » nang x, lang xa, nang ma
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
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 ty ((nang xa) or (tang ma)) hoi. lieu va cam tuc ((va hanh) OR (van hanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang xa) OR (tang ma)) hoi. lieu va cam tuc ((va hanh) OR (van hanh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang xa) or (tang ma)) hoi. lieu va cam tuc ((va hanh) OR (van hanh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang xa) or (tang ma)) hoi. lieu va cam tuc ((va hanh) OR (van hanh)) vi cua tre*.