Perhaps you should try some spelling variations:
dang thanh » dong thanh, dang hanh, hoang thanh
cua triet » cua viet, su triet, va triet
thanh van » thanh san, thanh toan, thanh phan
hieu hoa » tieu hoa, dieu hoa, hiep hoa
thu dang » thu hang, thu bang, thu dong
van cua » vang cua, ban cua, dan cua
su sach » vu sach
hieu ha » hieu va, hieu ca, hieu xa
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
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 (so sach)) y nang xa hoi. ((hieu ha) or (hieu hoa)) nam thu dang thanh van cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y nang xa hoi. ((hieu ha) OR (hieu hoa)) nam thu dang thanh van cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) y nang xa hoi. ((hieu ha) or (hieu hoa)) nam thu dang thanh van cua triet*".