Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
nang dai » nang dau, nang tai, lang dai
hanh vai » hanh va, hanh tai, hanh van
thuc va » thuc vat, thuc dan, thuc day
so sach » so sanh, bo sach, co sach
truc va » thuc vat, trung va
qua cam » qua cham, qua cac, qua ca
dai hoi » dai hoc, dai hai, dai moi
y nang » ky nang, ly nang, v nang

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

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