Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ta thanh » tai thanh, va thanh, ha thanh
xa thanh » va thanh, ha thanh, gia thanh
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
cac dac » cac dan, cac dai, cac bac
ve cac » va cac, vien cac
nang o » nang co, nang ho, nang ro
o hai » co hai, so hai, o lai
vi su » va su, ve su, ki su

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 hai. hieu ve cac dac ((xa thanh) OR (ta thanh)) vi su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang o hai. hieu ve cac dac ((xa thanh) OR (ta thanh)) vi su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang o hai. hieu ve cac dac ((xa thanh) OR (ta thanh)) vi su triet*.