Perhaps you should try some spelling variations:
phat thang » phat thanh, pham thang, pham thanh
sach phat » sach nha, sach tham, cach pha
thang va » hang va, trang va, thong va
van chat » cao chat
tu sach » thu sach, su sach, te sach
danh vi » dinh vi, danh di, danh va
cuu tre » cua tre, cau tren, cau treo
van cau » van dau, van hau, toan cau
va hoi » xa hoi, va hoc, va hoa

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 phat thang va hoi. hieu ((van cau) OR (van chat)) thuc vat ((danh vi) or (hanh vi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach phat thang va hoi. hieu ((van cau) OR (van chat)) thuc vat ((danh vi) OR (hanh vi)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach phat thang va hoi. hieu ((van cau) OR (van chat)) thuc vat ((danh vi) or (hanh vi)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach phat thang va hoi. hieu ((van cau) OR (van chat)) thuc vat ((danh vi) or (hanh vi)) cuu tre*.