Perhaps you should try some spelling variations:
xa thanh » va thanh, ha thanh, gia thanh
ta thanh » tai thanh, va thanh, ha thanh
su triet » su viet, su tien, ve 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
hieu ve » hieu va, hieu van
cac bac » cac bai, cac ban, cac cach
nang o » nang co, nang ho, nang ro
ve cac » va cac, vien cac
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 bac ((xa thanh) OR (ta thanh)) va su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang o hoi. hieu ve cac bac ((xa thanh) OR (ta thanh)) va su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang o hoi. hieu ve cac bac ((xa thanh) OR (ta thanh)) va su triet*.