Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
thanh vai » thanh hai, thanh van, thanh tai
qua nham » qua nhat, qua cham, sua nham
cua viet » ca viet, cua vat, cua dieu
va thanh » gia thanh, ban thanh, va tinh
thuc va » thuc vat, thuc dan, thuc day
so sach » so sanh, bo sach, co sach
dai hoi » dai hoc, dai hai, dai moi
va nang » van nang, da nang, cam nang
v nang » vu nang, van nang, voi 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 ((v nang) OR (va nang)) dai hoi. hieu qua nham thuc va thanh vai ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((v nang) OR (va nang)) dai hoi. hieu qua nham thuc va thanh vai ((cua viet) OR (hoa viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((v nang) OR (va nang)) dai hoi. hieu qua nham thuc va thanh vai ((cua viet) or (hoa viet))".
• Adding a wildcard symbol may retrieve word variants: so sach ((v nang) OR (va nang)) dai hoi. hieu qua nham thuc va thanh vai ((cua viet) or (hoa viet))*.