Perhaps you should try some spelling variations:
chat thuc » thuat thuc, nhan thuc, chat thai
van chat » cao chat
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
dao cau » dat cau, da cau, tao cau
dao cuu » dao huu, dao chu, dao cua
vat anh » van anh, sat anh, dat anh
lang xa » lang ha, dang xay, lang van
sai ky » sac ky

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 thu) or (sai ky)) lang xa hoi. hieu van chat thuc vat anh ((dao cuu) OR (dao cau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thu) OR (sai ky)) lang xa hoi. hieu van chat thuc vat anh ((dao cuu) OR (dao cau)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach thu) or (sai ky)) lang xa hoi. hieu van chat thuc vat anh ((dao cuu) OR (dao cau)) tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) or (sai ky)) lang xa hoi. hieu van chat thuc vat anh ((dao cuu) OR (dao cau)) tre*.