Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dai » hanh tai, hanh dao, vanh dai
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
ve chat » va chat, van chat
te sach » toc sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
va cao » va cac, va dao, va bao
va co » vo co

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky lang xa hoi. hieu ((((va cao) OR (va co))) or (ve chat)) thuc va hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu ((((va cao) OR (va co))) OR (ve chat)) thuc va hanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu ((((va cao) OR (va co))) or (ve chat)) thuc va hanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu ((((va cao) OR (va co))) or (ve chat)) thuc va hanh dai cua triet*.