Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thanh van » thanh san, thanh phan, thanh nhan
su triet » su viet, su tien, ve triet
thanh va » hanh va, thanh ha, thanh ve
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
cac tac » cac toc, cac bac, cac dac
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
ve cac » va cac, vien cac
nang o » nang co, nang ho, nang ro
tac xa » tuc xa, tac da
o hoi » co hoi, o hoc, o hai

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 o hoi. hieu ve cac tac xa ((thanh va) or (((thanh van) OR (thanh toan)))) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang o hoi. hieu ve cac tac xa ((thanh va) OR (((thanh van) OR (thanh toan)))) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang o hoi. hieu ve cac tac xa ((thanh va) or (((thanh van) OR (thanh toan)))) su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang o hoi. hieu ve cac tac xa ((thanh va) or (((thanh van) OR (thanh toan)))) su triet*.