Perhaps you should try some spelling variations:
thien luan » thien quan, thien van, hien luat
luan phan » luan van, luan hoan
van thanh » ban thanh, van tuan
van hang » van khang, van hoang, van thang
phan duc » pham duc, phan tu, phan dau
va triet » va thiet, va trien, ve triet
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
ban ky » van ky, dan ky
tu ban » thu ban, te ban
di va » dai va, di vao, doi va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ban ky ((nang xa) or (nang ma)) hoi. thien luan phan duc ((van hang) or (van thanh)) di va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ban ky ((nang xa) OR (nang ma)) hoi. thien luan phan duc ((van hang) OR (van thanh)) di va triet.
• Adding a wildcard symbol may retrieve word variants: tu ban ky ((nang xa) or (nang ma)) hoi. thien luan phan duc ((van hang) or (van thanh)) di va triet*.