Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
chat doc » chat hoc, chau doc, thuat doc
dinh dat » dinh ket, dinh van, dinh lam
dinh dai » sinh dai, dinh dao, dinh tai
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
va chat » van chat, va phat, cao chat
doc va » duoc va, hoc va, duc va
sac ky » cac ky, sai 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 y) or (sac ky)) lang xa hoi. hieu va chat doc va ((dinh dai) or (dinh dat)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sac ky)) lang xa hoi. hieu va chat doc va ((dinh dai) OR (dinh dat)) cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sac ky)) lang xa hoi. hieu va chat doc va ((dinh dai) or (dinh dat)) cua viet*.