Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vat hanh » vat thanh, van hanh, va hanh
hanh de » hanh ve, hanh kem
su sach » vu sach
so sach » so sanh, bo sach, co sach
ve cham » va cham, ve chat, vu cham
ve cac » va cac, vien cac
de cua » le cua, te cua, dieu 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: ((su sach) OR (so sach)) ky nang x hoi. hieu ((ve cham) or (ve cac)) thuc vat hanh de cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang x hoi. hieu ((ve cham) OR (ve cac)) thuc vat hanh de cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ky nang x hoi. hieu ((ve cham) or (ve cac)) thuc vat hanh de cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) ky nang x hoi. hieu ((ve cham) or (ve cac)) thuc vat hanh de cua triet*.