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
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
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 hoi. hieu ve cham thuc day 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 hoi. hieu ve cham thuc day hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: su ((sach vay) or (sach 2)) nang xa hoi. hieu ve cham thuc day hanh vi cua triet*.