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

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 de dat nuoc va 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 de dat nuoc va 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 de dat nuoc va than khai ((va triet) or (ve triet))*.