Perhaps you should try some spelling variations:
thanh voi » thanh loi, thanh moi, hanh voi
hoc sach » hoc sinh, hoc cac, hoc anh
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
xuc van » duc van, vuc van, xuc ban
luc van » luoc van, luu van, duc van
ve cam » ve cham, ve cac, va cam
voi su » voi suc, oi su, vi su
x hoi » xa hoi, o hoi, x ho

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 (hoc sach)) ky nang x hoi. hieu ve cam ((xuc van) OR (luc van)) thanh voi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (hoc sach)) ky nang x hoi. hieu ve cam ((xuc van) OR (luc van)) thanh voi su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (hoc sach)) ky nang x hoi. hieu ve cam ((xuc van) OR (luc van)) thanh voi su triet*".