Perhaps you should try some spelling variations:
cau truong » cac truong, cao truong, xa truong
truong va » truong dai, truong cao, truong dao
dang cao » nang cao, dang ca, dang cac
hieu van » hieu va, thien van, lieu va
cua tre » cua te, 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
cao cho » cap cho, cao chat
cuu tre » cau tren, cau treo

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

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