Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
va thanh » gia thanh, ban thanh, va tinh
va triet » va thiet, va trien, cua triet
ve triet » va trien, su triet
ky lang » ky dang, ky tang, tay lang
hieu ve » hieu va, hieu van
su sac » su sach, su cac, su xac
ve coc » ve cuoc, ve cac, ve co
luc va » duc va, tuc va, loc va

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) or (ky nang)) xa hoi. hieu ve coc luc va thanh dai ((va triet) OR (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky lang) OR (ky nang)) xa hoi. hieu ve coc luc va thanh dai ((va triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ((ky lang) or (ky nang)) xa hoi. hieu ve coc luc va thanh dai ((va triet) OR (ve triet))".
• Adding a wildcard symbol may retrieve word variants: su sac ((ky lang) or (ky nang)) xa hoi. hieu ve coc luc va thanh dai ((va triet) OR (ve triet))*.