Perhaps you should try some spelling variations:
su triet » su viet, ve triet
lang hoa » hang hoa, lang ha, nang hoa
nam thuc » nam thuoc, am thuc, nam thu
tu sach » thu sach, su sach, tu cach
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
su tien » su kien, su hien, tu tieng
ve nam » he nam, va nam, le nam

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