Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham thuc » nham thuc, pham thuc, tham thuc
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
hanh di » hanh vi, hanh de, hang di
va cham » va chat, va tham
hieu va » lieu va, hieu qua
su sach » so sach
vu sach » vu bach, vu khach
nang xa » lang xa, nang ma, mang xa
di cua » dai cua, doi cua, de 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) or (vu sach)) v ((nang xa) or (nang x)) hoi. hieu va cham thuc van hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) v ((nang xa) OR (nang x)) hoi. hieu va cham thuc van hanh di cua triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) v ((nang xa) or (nang x)) hoi. hieu va cham thuc van hanh di cua triet*.