Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te 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
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang x hoi. hieu ((va cam) or (va cao)) thuc va dan vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu ((va cam) OR (va cao)) thuc va dan vi cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu ((va cam) or (va cao)) thuc va dan vi cua triet*.