Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vien cac » vien bach, vien dai, vien da
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
hanh le » thanh le, hanh ve, hanh de
su sach » so sach, vu sach
ve cac » va cac
y nang » ky nang, ly nang, v nang
ve cam » ve cham, va cam, ve cai
le cua » ly 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 y nang x hoi. hieu ((ve cam) or (((ve cac) OR (vien cac)))) thuc day hanh le 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) OR (vien cac)))) thuc day hanh le 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) OR (vien cac)))) thuc day hanh le cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu ((ve cam) or (((ve cac) OR (vien cac)))) thuc day hanh le cua triet*.