Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
danh sai » dung sai, danh bat, danh dau
dang xay » dang van, van xay
te sach » toc sach
va danh » va dinh, va dan, va hanh
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, lang van
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((lang xa) OR (dang xay)) hoi. hieu va cam duc va danh sai ((cua viet) or (qua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((lang xa) OR (dang xay)) hoi. hieu va cam duc va danh sai ((cua viet) OR (qua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((lang xa) OR (dang xay)) hoi. hieu va cam duc va danh sai ((cua viet) or (qua su))".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((lang xa) OR (dang xay)) hoi. hieu va cam duc va danh sai ((cua viet) or (qua su))*.