Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
lang van » tang van, hoang van, giang van
dang van » hoang van, hang va
danh vai » danh sai, danh va, doanh van
ban danh » ban doanh, ban hanh, ban dan
cau cua » cau qua, ca cua, cu cua
cuu tre » cua tre, cau tren, cau treo
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ve cau » ke cau, va cau, ve cac

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 ky ((lang van) OR (dang van)) hoc. hieu ve cau cua ban danh vai ((cuu tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((lang van) OR (dang van)) hoc. hieu ve cau cua ban danh vai ((cuu tre) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((lang van) OR (dang van)) hoc. hieu ve cau cua ban danh vai ((cuu tre) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((lang van) OR (dang van)) hoc. hieu ve cau cua ban danh vai ((cuu tre) or (su triet))*.