Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
so sach » so sanh, bo sach, co sach
va cham » va chat, va tham
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
hang ma » hang va, hang ca, nang ma
tang ma » mang may, tang van
luc va » tuc va, loc va
vi cua » vai cua, di cua
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: so sach ty ((hang ma) or (tang ma)) hoi. hieu va cham ((luc va) OR (duc va)) thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((hang ma) OR (tang ma)) hoi. hieu va cham ((luc va) OR (duc va)) thanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((hang ma) or (tang ma)) hoi. hieu va cham ((luc va) OR (duc va)) thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ty ((hang ma) or (tang ma)) hoi. hieu va cham ((luc va) OR (duc va)) thanh vi cua te*.