Perhaps you should try some spelling variations:
sach thien » sach thieu, sach tien, cach thien
thien nang » thien bang, thien dang, trien nang
pham thuc » phap thuc, pham chuc, nham thuc
danh sai » dung sai, danh bat, danh dau
so sach » so sanh, bo sach, co sach
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
sai cua » dai cua, hai cua, lai cua
hieu v » hieu va, hieu ve, hieu 2
v pham » vi pham, d pham
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 thien nang x hoi. hieu v pham thuc va danh sai cua te~.
• Adding a wildcard symbol may retrieve word variants: so sach thien nang x hoi. hieu v pham thuc va danh sai cua te*.