Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
chat doc » chat hoc, chau doc, thuat doc
chat soc » cham soc, chat hoc, chat song
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
sach ky » sac ky, sach y, sach ty
te sach » toc sach
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
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 va ((chat soc) OR (chat doc)) 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 va ((chat soc) OR (chat doc)) 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 va ((chat soc) OR (chat doc)) va danh di cua viet".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) or (nang ma)) hoi. hieu va ((chat soc) OR (chat doc)) va danh di cua viet*.