Perhaps you should try some spelling variations:
te sach » toc sach
thuc va » thuc vat, thuc dan, thuc day
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao
va dan » ca dan, va dao, va dau
vi cua » vai cua
di cua » dai cua, doi cua, de cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang x ho. hieu ((va cam) or (va cao)) thuc va dan ((vi cua) OR (di cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x ho. hieu ((va cam) OR (va cao)) thuc va dan ((vi cua) OR (di cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang x ho. hieu ((va cam) or (va cao)) thuc va dan ((vi cua) OR (di cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach y nang x ho. hieu ((va cam) or (va cao)) thuc va dan ((vi cua) OR (di cua)) triet*.