Perhaps you should try some spelling variations:
sach thuy » sach thu, sach thue, sach tham
thuy dong » thuy duong, huy dong, thuy dung
tu sach » thu sach, su sach, te sach
hoc vat » hoc viet, thuc vat
tu cham » toc cham, thi cham
cuu tre » cua tre, cau tren, cau treo
vu cham » va cham, vu kham, qua cham
dong xa » dong xay, duong xa, dong ha
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 thuy dong xa hoi. hieu ((vu cham) OR (tu cham)) ((hoc va) or (hoc vat)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thuy dong xa hoi. hieu ((vu cham) OR (tu cham)) ((hoc va) OR (hoc vat)) hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thuy dong xa hoi. hieu ((vu cham) OR (tu cham)) ((hoc va) or (hoc vat)) hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach thuy dong xa hoi. hieu ((vu cham) OR (tu cham)) ((hoc va) or (hoc vat)) hanh vi cuu tre*.