Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hieu van » hieu va, thien van, lieu va
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 ve » hieu va
cac duc » cac du, cao duc, cac dac
duc gia » quoc gia
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
kien » bien, vien, tien

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky lang xa hoi. ((hieu ve) or (hieu van)) cac duc gia thanh hai ((su triet) or (su kien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky lang xa hoi. ((hieu ve) OR (hieu van)) cac duc gia thanh hai ((su triet) OR (su kien)).
• Adding a wildcard symbol may retrieve word variants: su sac ky lang xa hoi. ((hieu ve) or (hieu van)) cac duc gia thanh hai ((su triet) or (su kien))*.