Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cau thuc » cau truc, cuu thuc, can thuc
chieu ke » hieu ky, hieu ve, hieu kem
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
vu hanh » vu khanh, vu thanh, vu anh
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
du hanh » dieu hanh, duy khanh, luu hanh
hieu ke » hieu kem, hieu ky, hieu ve
ha hoi » hoa hoi, ha noi, xa hoi
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: ((vu hanh) OR (du hanh)) ky lang ha hoi. ((hieu ke) or (chieu ke)) cau thuc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu hanh) OR (du hanh)) ky lang ha hoi. ((hieu ke) OR (chieu ke)) cau thuc va hanh vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu hanh) OR (du hanh)) ky lang ha hoi. ((hieu ke) or (chieu ke)) cau thuc va hanh vi cua triet*".