Perhaps you should try some spelling variations:
thien van » thi van
thanh dan » thanh san, thanh van, thanh dat
cua triet » cua viet, su triet, va triet
tai khoi » tai khoa, mai khoi, tao khoi
su sach » so sach, vu sach
ty nang » ty xang, ty hang, ly nang
van cam » van nam, van lam, van cau
dan cua » dan ca, ban cua, dai cua
luc va » tuc va, loc va

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)) tai khoi. thien van cam ((luc va) OR (duc va)) thanh dan cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ky nang)) tai khoi. thien van cam ((luc va) OR (duc va)) thanh dan cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) or (ky nang)) tai khoi. thien van cam ((luc va) OR (duc va)) thanh dan cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (ky nang)) tai khoi. thien van cam ((luc va) OR (duc va)) thanh dan cua triet*.