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