Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
nong xa » dong xa, nong va, cong xay
song xa » song cua
hieu va » lieu va, hieu qua
cao xuc » cam xuc, cao duc, cao suc
cao tu » cao thu, co tu, cao su
va cao » va cac, va co, va dao
va dan » ca dan, va dao, va dau
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: cu cao tu ((nong xa) or (song xa)) hoi. hieu va cao xuc ((va dan) or (van hanh)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cu cao tu ((nong xa) OR (song xa)) hoi. hieu va cao xuc ((va dan) OR (van hanh)) vi su triet.
• Adding a wildcard symbol may retrieve word variants: cu cao tu ((nong xa) or (song xa)) hoi. hieu va cao xuc ((va dan) or (van hanh)) vi su triet*.