Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cau thuc » cau truc, cuu thuc, can thuc
vat hanh » vat thanh, van hanh, va hanh
sach ty » sach y, sach tu, sach thu
hieu va » lieu va
hanh va » hang va, hanh vi
sac ky » cac ky, sai ky
va cua » va chua, via cua, ca cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (sac ky)) nang x hoi. ((hieu va) or (hieu qua)) cau thuc vat hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sac ky)) nang x hoi. ((hieu va) OR (hieu qua)) cau thuc vat hanh va cua triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sac ky)) nang x hoi. ((hieu va) or (hieu qua)) cau thuc vat hanh va cua triet*.