Perhaps you should try some spelling variations:
nang dai » nang dau, nang tai, lang dai
hai truc » dai truc, hai trac, hang truc
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, cua vat, cua dieu
so sach » so sanh, bo sach, co sach
dai moi » doi moi, dai hoi
qua hai » qua hoat
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van 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 dai moi. hieu qua hai truc va hanh vai ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach v nang dai moi. hieu qua hai truc va hanh vai ((cua viet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: so sach v nang dai moi. hieu qua hai truc va hanh vai ((cua viet) or (hoa viet))*.