Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
ban danh » ban doanh, ban hanh, ban dan
tu sang » thu sang, tu san, tu lang
sang ky » sang kyo, dang ky, tang ky
ky lang » ky nang, ky dang, ky tang
danh vi » hanh vi, dinh vi, danh di
cuu tre » cua tre, cau tren, cau treo
ca tren » cau tren, cu tren, la tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sang ky lang ((van hoc) OR (van hoa)). hieu van nam cua ban danh vi ((cuu tre) or (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sang ky lang ((van hoc) OR (van hoa)). hieu van nam cua ban danh vi ((cuu tre) OR (ca tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sang ky lang ((van hoc) OR (van hoa)). hieu van nam cua ban danh vi ((cuu tre) or (ca tren))*".