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
su sach » so sach, vu sach
ty nang » ty xang, ty hang, ly nang
duc ban » duc tan, duc van, dua 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: su sach ((ty nang) OR (ky nang)) xa hoi. hieu ((van lam) or (van nam)) duc ban thanh van cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ky nang)) xa hoi. hieu ((van lam) OR (van nam)) duc ban thanh van cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ky nang)) xa hoi. hieu ((van lam) or (van nam)) duc ban thanh van cua triet*".