Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cac bac » cac bai, cac ban, cac cach
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
va dan » ca dan, va dau, va dap
va dao » ca dao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky lang xa hoi. hieu va cac bac ((va dan) or (va dao)) hai ((su triet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky lang xa hoi. hieu va cac bac ((va dan) OR (va dao)) hai ((su triet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang xa hoi. hieu va cac bac ((va dan) or (va dao)) hai ((su triet) or (cua vat))*.