Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
thien van » thi van
cua viet » ca viet, hoa viet, cua vat
van cham » van chat, van tham, va cham
cao hoi » cau hoi, co hoi, cao hoc
su sach » so sach, vu sach
lap cua » lai cua, tap cua, lam cua
tu sach » thu sach, te sach, tu cach
soc va » hoc va, loc va, goc va
doc va » duoc va, hoc va, duc va

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) OR (su sach)) ky nang cao hoi. thien van cham ((soc va) or (doc va)) thanh lap cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang cao hoi. thien van cham ((soc va) OR (doc va)) thanh lap cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky nang cao hoi. thien van cham ((soc va) or (doc va)) thanh lap cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky nang cao hoi. thien van cham ((soc va) or (doc va)) thanh lap cua viet*.