Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
toc sach » hoc sach, doc sach, thuoc sach
tham tuc » tham thuc, thai tuc, nham thuc
danh dai » danh dau, danh di, danh sai
va triet » va thiet, va trien, ve triet
nang mai » nang ma, nang tai, lang mai
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
va danh » va dinh, va dan, va hanh
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, dua tren
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang mai hoi. hieu va tham tuc va danh dai ((cua tre) or (((cua triet) or (va triet))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang mai hoi. hieu va tham tuc va danh dai ((cua tre) OR (((cua triet) OR (va triet)))).
• Adding a wildcard symbol may retrieve word variants: toc sach y nang mai hoi. hieu va tham tuc va danh dai ((cua tre) or (((cua triet) or (va triet))))*.