Perhaps you should try some spelling variations:
ve triet » va trien, su triet
nam thuc » nam thuoc, am thuc, nam thu
hoa hoi » khoa hoi, hoa hoc, hoa doi
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu le » hieu ve, hieu he, hieu ly
tu sach » thu sach, su sach, tu cach
ky dang » ky nang, ky danh
te sach » toc sach
ha hoi » ha noi, xa hoi, va hoi
le nam » ly nam, he nam, le na
vi ve » va ve, gi ve, ve ve

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) or (te sach)) ky dang ((ha hoi) or (hoa hoi)). hieu le nam thuc va hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky dang ((ha hoi) OR (hoa hoi)). hieu le nam thuc va hanh vi ve triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky dang ((ha hoi) or (hoa hoi)). hieu le nam thuc va hanh vi ve triet*.