Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh dai » thanh hai, thanh tai, thanh dat
hieu van » hieu va, thien van, lieu va
ve triet » va trien, su triet
tu sach » thu sach, su sach, tu cach
te sach » toc sach
ty nang » ky nang, ty xang, ty hang
van hoc » van hoa
hoc tac » hoc tach, hoc tap, hoc cac
tac ban » tai ban, cac ban, tao ban
dai ve » dap ve, dau ve, dai va
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: ((tu sach) OR (te sach)) ty nang x hoi. hieu van hoc tac ban thanh dai ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ty nang x hoi. hieu van hoc tac ban thanh dai ve triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ty nang x hoi. hieu van hoc tac ban thanh dai ve triet*.