Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
ve cham » va cham, ve chat, vu cham
hanh di » hanh vi, hanh de, hang di
su sach » so sach, vu sach
ve cam » ve cac, va cam, ve cai
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
di cua » dai cua, doi cua, de cua

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