Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh tue » hanh tu, hanh tuyen, hanh theo
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
tue cua » te cua
su sach » so sach, vu sach
ty nang » ty xang, ty hang, ly nang
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
o hoi » co hoi, o hoc, o hai

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 ((ty nang) OR (ky nang)) o hoi. hieu ((ve cam) or (ve cac)) thuc day hanh tue cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ky nang)) o hoi. hieu ((ve cam) OR (ve cac)) thuc day hanh tue cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ky nang)) o hoi. hieu ((ve cam) or (ve cac)) thuc day hanh tue cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) OR (ky nang)) o hoi. hieu ((ve cam) or (ve cac)) thuc day hanh tue cua triet*.