Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
su sach » so sach
vu sach » vu bach, vu khach
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
xuc ban » cuc ban, quoc ban, xuat ban
duc ban » duc tan, duc van, dua ban
van cua » vang cua, ban cua, dan cua
y nang » ky nang, ly nang, v nang

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) or (vu sach)) y nang xa hoi. hieu van cam ((xuc ban) OR (duc ban)) thanh van cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) y nang xa hoi. hieu van cam ((xuc ban) OR (duc ban)) thanh van cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) y nang xa hoi. hieu van cam ((xuc ban) OR (duc ban)) thanh van cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) y nang xa hoi. hieu van cam ((xuc ban) OR (duc ban)) thanh van cua triet*.