Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham thuc » nham thuc, pham thuc, tham thuc
sach vay » sach va, sach hay, sach nay
dao hanh » dao thanh, dang hanh, ban hanh
thuc dao » thuc dan, thuc day, chuc dao
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
sach 2 » sach y
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: su ((sach vay) or (sach 2)) ((nang xa) OR (nang x)) hoi. hieu ve cham thuc dao hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach vay) OR (sach 2)) ((nang xa) OR (nang x)) hoi. hieu ve cham thuc dao hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach vay) or (sach 2)) ((nang xa) OR (nang x)) hoi. hieu ve cham thuc dao hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach vay) or (sach 2)) ((nang xa) OR (nang x)) hoi. hieu ve cham thuc dao hanh vi cua triet*.