Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
lang hoa » hang hoa, lang ha, nang hoa
hanh ve » hanh vi, hanh va, hanh kem
hanh de » hanh kem
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, te sach, tu cach
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky lang » ky nang, ky dang, ky tang
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ve am » va am

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 (su sach)) ky lang hoa hoi. hieu ve am thuc va ((hanh de) OR (hanh ve)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky lang hoa hoi. hieu ve am thuc va ((hanh de) OR (hanh ve)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky lang hoa hoi. hieu ve am thuc va ((hanh de) OR (hanh ve)) su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky lang hoa hoi. hieu ve am thuc va ((hanh de) OR (hanh ve)) su triet*.