Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
than khai » than khoi, tuan khai, than thoai
ve triet » va trien, su triet
san than » sang than, san thanh, ban than
nuoc san » nuoc luan, nguoi san, nuoc quan
lang xa » lang ha, dang xay, lang van
hieu de » hieu ve, hieu he, hieu le
sac ky » cac ky
de dat » de 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 de dat nuoc san than khai ((cua 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 san than khai ((cua 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 san than khai ((cua triet) or (ve triet))*.