Perhaps you should try some spelling variations:
xanh dien » danh dien, nganh dien, nhanh dien
thu sach » tu sach, thuat sach, thuoc sach
van chat » cao chat
cau tren » cu tren, dau tren, ca tren
van cau » van dau, van hau, toan cau
sach ky » sac ky, sach y, sach ty
xanh di » danh di, vanh dai, xanh tai
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky lang xa hoi. hieu ((van cau) OR (van chat)) hoc va ((xanh di) or (xanh dien)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky lang xa hoi. hieu ((van cau) OR (van chat)) hoc va ((xanh di) OR (xanh dien)) cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky lang xa hoi. hieu ((van cau) OR (van chat)) hoc va ((xanh di) or (xanh dien)) cau tren".
• Adding a wildcard symbol may retrieve word variants: thu sach ky lang xa hoi. hieu ((van cau) OR (van chat)) hoc va ((xanh di) or (xanh dien)) cau tren*.