Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
thanh ve » hanh ve, thanh va, thanh vien
toc sach » hoc sach, doc sach, thuoc sach
thanh vi » hanh vi, thanh va, nhanh vi
ty nang » ky nang, ty xang, ty hang
van bac » van ban, van bao, van hac
bo van » vo van, so van, do van
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: ((te sach) or (toc sach)) ty nang x hoi. hieu van bac bo van ((thanh vi) OR (thanh ve)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty nang x hoi. hieu van bac bo van ((thanh vi) OR (thanh ve)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ty nang x hoi. hieu van bac bo van ((thanh vi) OR (thanh ve)) cua triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ty nang x hoi. hieu van bac bo van ((thanh vi) OR (thanh ve)) cua triet*.