Perhaps you should try some spelling variations:
pham thang » pham thanh, pham hang, pham thuong
sach pham » sach tham, sach phat, sach phap
thang xa » thang va, thong xa, trang xa
dau thuc » dan thuc, dai thuc, dam thuc
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
dinh vi » dinh ve, dinh viet, dinh tri
cuu tre » cua tre, cau tren, cau treo
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach pham thang xa hoi. hieu va dau thuc vat ((dinh vi) or (hanh vi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach pham thang xa hoi. hieu va dau thuc vat ((dinh vi) OR (hanh vi)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach pham thang xa hoi. hieu va dau thuc vat ((dinh vi) or (hanh vi)) cuu tre*.