Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc day » thuc dan, thuc vat
sach ty » sach y, sach tu, sach thu
hanh ve » hanh vi, hanh va, hanh kem
hanh de » hanh kem
su sach » so sach, vu sach
ty nang » ky nang, ty xang, ty hang
ve cam » ve cham, va cam, ve cai
nang o » nang co, nang ho, nang ro
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 o hoi. hieu ((ve cam) or (ve cac)) thuc day ((hanh de) OR (hanh ve)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang o hoi. hieu ((ve cam) OR (ve cac)) thuc day ((hanh de) OR (hanh ve)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang o hoi. hieu ((ve cam) or (ve cac)) thuc day ((hanh de) OR (hanh ve)) cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang o hoi. hieu ((ve cam) or (ve cac)) thuc day ((hanh de) OR (hanh ve)) cua triet*.