Perhaps you should try some spelling variations:
cau trung » cau truong, cac trung, cao trung
dang cay » dang xay, dang ca, dang cac
trung va » truong va, trang va, trung ha
hieu van » hieu va, thien van, lieu va
cua tre » cuu tre, cua triet, dua tren
xanh di » danh di, vanh dai, xanh tai
va xanh » va danh, va hanh, va anh
van cau » van dau, van hau, van chat
sach ty » sach tu, sach thu, xach tay
cay cho » cap cho, cao cho, cay co
cua te » cua tu

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach y)) dang cay cho. hieu van cau trung va xanh di ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach y)) dang cay cho. hieu van cau trung va xanh di ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach y)) dang cay cho. hieu van cau trung va xanh di ((cua tre) OR (cua te))*.