Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dan hanh » dang hanh, dan khanh, dan thanh
thuc dan » thuc hanh, hoc dan, thuc vat
hanh ve » hanh vi, hanh va, hanh kem
su sach » so sach, vu sach
ve cam » ve cham, va cam, ve cai
y nang » ky nang, ly nang, may nang
ve cac » va cac, vien cac
v nang » va nang, vu nang, van nang
ve cua » le cua, de cua, te 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)) x ho. hieu ((ve cam) or (ve cac)) thuc dan hanh ve cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (v nang)) x ho. hieu ((ve cam) OR (ve cac)) thuc dan hanh ve cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (v nang)) x ho. hieu ((ve cam) or (ve cac)) thuc dan hanh ve cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (v nang)) x ho. hieu ((ve cam) or (ve cac)) thuc dan hanh ve cua triet*.