Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
qua chat » qua nhat, qua cham, luan chat
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
sach ky » sac ky, sach y, sach ty
danh di » danh du, xanh di, danh dien
te sach » toc sach
soc va » hoc va, doc va, goc va
loc va » hoc va, luc va
di cua » dai cua, doi cua, de cua

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 ((nang xa) or (nang ma)) hoi. hieu qua chat ((soc va) OR (loc va)) danh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (nang ma)) hoi. hieu qua chat ((soc va) OR (loc va)) danh di cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang xa) or (nang ma)) hoi. hieu qua chat ((soc va) OR (loc va)) danh di cua viet".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) or (nang ma)) hoi. hieu qua chat ((soc va) OR (loc va)) danh di cua viet*.