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

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 vi ((su triet) OR (su tien))~.
• 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 vi ((su triet) OR (su tien))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang o hai. hieu ve cac dac xa thanh vi ((su triet) OR (su tien))*.