Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
canh thuc » anh thuc, cach thuc, danh thuc
dan danh » van danh, han danh, ban danh
thuc dan » thuc hanh, hoc dan, thuc vat
hieu van » hieu va, thien van, hieu ve
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
danh vi » hanh vi, dinh vi, danh di
so sach » so sanh, bo sach, co sach
vi cua » vai cua, di 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 sach y ((nang xa) or (nang ma)) hoi. ((hieu van) OR (lieu va)) canh thuc dan danh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((nang xa) OR (nang ma)) hoi. ((hieu van) OR (lieu va)) canh thuc dan danh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((nang xa) or (nang ma)) hoi. ((hieu van) OR (lieu va)) canh thuc dan danh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang xa) or (nang ma)) hoi. ((hieu van) OR (lieu va)) canh thuc dan danh vi cua triet*.