Perhaps you should try some spelling variations:
thien van » thi van
danh dai » danh dau, danh di, danh sai
van chat » cao chat
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
soc va » loc va, doc va, goc va

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