Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
ban thanh » ban hanh, ban hang
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van chay » van chat, san chay, toan chay
tu sach » thu sach, su sach, te sach
ky mang » ky nang, ke mang, ky tang
ky dang » ky nang, ky danh
may hoa » may khoa, ma hoa, day hoa
dua ban » dia ban, cua ban, qua ban
van cua » vang cua, ban cua, dan 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 ((ky mang) OR (ky dang)) may hoa. hieu van chay dua ban thanh van cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky mang) OR (ky dang)) may hoa. hieu van chay dua ban thanh van cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky mang) OR (ky dang)) may hoa. hieu van chay dua ban thanh van cua triet*.