Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » thien van, lieu va
cau thuc » cau truc, cuu thuc, can thuc
thuc van » thuc vat, thuc dan, thuc va
hieu va » lieu va, hieu qua
van anh » van thanh, tuan anh, van minh
su sai » su tai, su hai, su dai
sai ky » sac ky
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky nang x ho. ((((hieu ve) OR (hieu van))) OR (hieu va)) cau thuc van anh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky nang x ho. ((((hieu ve) OR (hieu van))) or (hieu va)) cau thuc van anh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sai ky nang x ho. ((((hieu ve) OR (hieu van))) or (hieu va)) cau thuc van anh vi cua triet*.