Perhaps you should try some spelling variations:
thue dang » thu dang, thuoc dang, thien dang
sach thue » sach thu, sach thieu, sach tham
dang cay » dang xay, dang ca, dang cac
cay phoi » cap phoi, tay hoi, cay cho
tu sach » thu sach, su sach, te sach
hoc vat » hoc va, hoc viet, thuc vat
hoc van » hoc dan, hoc va, hoc phan
cuu tre » cua tre, cau tren, cau treo
tu cham » toc cham, thi cham
vu cham » va cham, vu kham, qua cham
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 thue dang cay phoi. hieu ((vu cham) OR (tu cham)) ((hoc van) or (hoc vat)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thue dang cay phoi. hieu ((vu cham) OR (tu cham)) ((hoc van) OR (hoc vat)) hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thue dang cay phoi. hieu ((vu cham) OR (tu cham)) ((hoc van) or (hoc vat)) hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach thue dang cay phoi. hieu ((vu cham) OR (tu cham)) ((hoc van) or (hoc vat)) hanh vi cuu tre*.