Perhaps you should try some spelling variations:
thanh moi » thanh loi, thanh hoa, thanh hai
van thanh » ban thanh, van tuan
dau luan » dan luan, dat luan, khau luan
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
sac ky » sai ky
va dau » va dao
cua tu » cua tuc, cua su, cua cu

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 (cac ky)) nang xa hoi. hieu va dau luan van thanh moi ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (cac ky)) nang xa hoi. hieu va dau luan van thanh moi ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sac ky) or (cac ky)) nang xa hoi. hieu va dau luan van thanh moi ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) or (cac ky)) nang xa hoi. hieu va dau luan van thanh moi ((cua te) OR (cua tu))*.