Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
hanh ve » hanh vi, hanh va, hanh kem
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cai, ve cau
va cam » va cham, va cac, va cao
ve cac » va cac, vien cac
ve va » ve van, te va, ke va

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