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
hieu van » hieu va, thien van, lieu va
cau thuc » cau truc, cuu thuc, can thuc
cau treo » cau theo, cau tren, cau triet
tu sach » thu sach, su sach, te sach
van cau » van dau, van hau, van chat
danh vi » dinh vi, danh di, danh va

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 van cau thuc vat ((danh vi) or (hanh vi)) cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach pham thang xa hoi. hieu van cau thuc vat ((danh vi) OR (hanh vi)) cau treo.
• Adding a wildcard symbol may retrieve word variants: tu sach pham thang xa hoi. hieu van cau thuc vat ((danh vi) or (hanh vi)) cau treo*.