Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh di » thanh doi, thanh de, thanh do
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
cac loc » cac toc, cac hoc, cac nuoc
cac lop » cac hop, cac loai
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky ((nang xa) OR (nang ma)) hoi. lieu va ((cac loc) or (cac lop)) gia thanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((nang xa) OR (nang ma)) hoi. lieu va ((cac loc) OR (cac lop)) gia thanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky ((nang xa) OR (nang ma)) hoi. lieu va ((cac loc) or (cac lop)) gia thanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: tu san ky ((nang xa) OR (nang ma)) hoi. lieu va ((cac loc) or (cac lop)) gia thanh di cua triet*.