Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dan khanh » dang khanh, van khanh, dat khanh
khanh ve » hanh ve, thanh ve, khanh v
thuc dan » thuc hanh, hoc dan, thuc vat
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
ve cua » le cua, de cua, te cua
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 ky nang ((x ho) or (o hoi)). hieu ((ve cam) or (ve cac)) thuc dan khanh ve cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((x ho) OR (o hoi)). hieu ((ve cam) OR (ve cac)) thuc dan khanh ve cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((x ho) or (o hoi)). hieu ((ve cam) or (ve cac)) thuc dan khanh ve cua triet*.