Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
ban danh » ban doanh, ban hanh, ban dan
cau tren » cu tren, dau tren, ca tren
van hoc » van hoa
hieu va » lieu va, hieu qua
danh vi » hanh vi, dinh vi, danh di
cuu tre » cua tre, cau treo
san ky » sang ky, dan ky, ban ky
va nam » van nam, ha nam, va nay

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

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