Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
so sanh » do sanh
sanh ky » hanh ky, sang ky, nganh ky
nang ma » tang ma, sang ma, nang cao
cach tu » cach thuc
cac tu » cac thu, cac du, tac tu
va dan » ca dan, va dao, va dau
dan di » danh di, dan da, dan de
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: so sanh ky nang ma hoa. ((hieu qua) or (lieu va)) ((cac tu) OR (cach tu)) va dan di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky nang ma hoa. ((hieu qua) OR (lieu va)) ((cac tu) OR (cach tu)) va dan di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ky nang ma hoa. ((hieu qua) or (lieu va)) ((cac tu) OR (cach tu)) va dan di cua triet".
• Adding a wildcard symbol may retrieve word variants: so sanh ky nang ma hoa. ((hieu qua) or (lieu va)) ((cac tu) OR (cach tu)) va dan di cua triet*.