Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
van cam » van nam, van lam, van cau
xuc ban » duc ban, cuc ban, quoc ban
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: tu sach thu ((nang ma) OR (sang ma)) hoi. hieu van cam xuc ban thanh vi cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu ((nang ma) OR (sang ma)) hoi. hieu van cam xuc ban thanh vi cua viet*".