Perhaps you should try some spelling variations:
tham thang » pham thang, thanh thang, pham thanh
sach tham » sach nha
van chat » cao chat
thang ma » thang mua, tang ma, thang va
thuc dan » thuc hanh, hoc dan, thuc vat
tu sach » thu sach, su sach, te sach
truc va » thuc va, thuc vat, trung va
van cau » van dau, van hau, toan cau
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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