Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc ban » thuoc ban, thuc dan, thu ban
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
tuc ban » truc ban, tu ban, tuc dan
y nang » ly nang, v nang, may nang
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua

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