Perhaps you should try some spelling variations:
than khai » than khoi, tuan khai, than thoai
ve triet » va trien, su triet
van than » van thanh, van thang, van tuan
va triet » va thiet, va trien, cua triet
nuoc van » nuoc va, nuoc san, luoc van
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
sac ky » cac ky
ve dat » de dat, va dat, ve dao

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) or (sai ky)) lang xa hoi. hieu ve dat nuoc van than khai ((va triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (sai ky)) lang xa hoi. hieu ve dat nuoc van than khai ((va triet) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) or (sai ky)) lang xa hoi. hieu ve dat nuoc van than khai ((va triet) or (ve triet))*.