Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
nang lai » nang tai, mang lai, nang cai
thuc day » thuc dan, thuc vat
thuc va » thuc vat, thuc dan
hang di » hang doi, hang vi, hang dien
su sach » so sach, vu sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
lai hoi » dai hoi, lai hoa, lai roi
truc va » thuc vat, trung va
y nang » ky nang, ly nang, v nang
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang lai hoi. hieu ve cham ((truc va) or (((thuc va) OR (thuc day)))) hang di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang lai hoi. hieu ve cham ((truc va) OR (((thuc va) OR (thuc day)))) hang di cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang lai hoi. hieu ve cham ((truc va) or (((thuc va) OR (thuc day)))) hang di cua viet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang lai hoi. hieu ve cham ((truc va) or (((thuc va) OR (thuc day)))) hang di cua viet*.