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
hanh di » hanh vi, hanh de, hang di
su sach » so sach, vu sach
ly nang » ky nang, ly hang, ly vang
va cam » va cham, va cac, va cao
y nang » ky nang, v nang, may nang
ve cac » va cac, vien cac
di cua » dai cua, doi cua, de 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) OR (ly nang)) x hoi. hieu ((va cam) or (ve cac)) thuc day hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ly nang)) x hoi. hieu ((va cam) OR (ve cac)) thuc day hanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (ly nang)) x hoi. hieu ((va cam) or (ve cac)) thuc day hanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (ly nang)) x hoi. hieu ((va cam) or (ve cac)) thuc day hanh di cua triet*.