Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
nang hoa » nang hoat, hang hoa, nang hoc
su triet » su viet, su tien, ve triet
so sanh » do sanh
co sach » bo sach, cuon sach, hoc sach
hoa hoi » khoa hoi, hoa hoc, hoa doi
van cau » van dau, van chat, toan cau
van hau » van ha, van hai, van dau
duc gia » quoc gia
lap su » lap du, lap tu, lai su

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (co sach)) ky nang hoa hoi. hieu ((van cau) OR (van hau)) duc gia thanh lap su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sanh) or (co sach)) ky nang hoa hoi. hieu ((van cau) OR (van hau)) duc gia thanh lap su triet~".
• Adding a wildcard symbol may retrieve word variants: ((so sanh) or (co sach)) ky nang hoa hoi. hieu ((van cau) OR (van hau)) duc gia thanh lap su triet*.