Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dieu » han dieu, hinh dieu, hoang dieu
dieu cua » dieu tra
thuc dan » hoc dan, thuc vat
su sach » so sach, vu sach
y nang » ky nang, ly nang, v nang
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
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 y nang x hoi. hieu ((ve cam) or (ve cac)) ((thuc dan) OR (thuc hanh)) hanh dieu cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu ((ve cam) OR (ve cac)) ((thuc dan) OR (thuc hanh)) hanh dieu cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. hieu ((ve cam) or (ve cac)) ((thuc dan) OR (thuc hanh)) hanh dieu cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu ((ve cam) or (ve cac)) ((thuc dan) OR (thuc hanh)) hanh dieu cua triet*.