Perhaps you should try some spelling variations:
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, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van hoc » van hoa
tac ban » cac ban, tao ban, tay ban
tai ban » tai san, tai ngan, tai benh
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 ty nang x hoi. hieu van hoc ((tac ban) OR (tai ban)) thanh dai ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. hieu van hoc ((tac ban) OR (tai ban)) thanh dai ve triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu van hoc ((tac ban) OR (tai ban)) thanh dai ve triet*.