Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
ty hang » ly hang, ty xang, thi hang
sach ty » sach y, sach tu, sach thu
va hanh » va thanh, va danh, ban hanh
vi cua » vai cua, di cua
cua te » cua tu
va cam » va cham, va cac, va cao
ve cai » va cai, ve cac, ve tai
hang x » nang x, hoang xa, chang xu
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: tu sach ty hang x hoi. hieu ((ve cai) or (va cam)) duc ((va hanh) OR (van hanh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty hang x hoi. hieu ((ve cai) OR (va cam)) duc ((va hanh) OR (van hanh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty hang x hoi. hieu ((ve cai) or (va cam)) duc ((va hanh) OR (van hanh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ty hang x hoi. hieu ((ve cai) or (va cam)) duc ((va hanh) OR (van hanh)) vi cua te*.