Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
thien van » thi van
cua viet » ca viet, hoa viet, cua vat
van chat » cao chat
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
xuc ban » duc ban, quoc ban, xuat ban
cuc ban » cua ban, cac ban, cuu ban
vu sach » vu bach, vu khach
su sach » so sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu sach)) ky dang xa hoi. thien van chat ((xuc ban) OR (cuc ban)) thanh dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky dang xa hoi. thien van chat ((xuc ban) OR (cuc ban)) thanh dai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky dang xa hoi. thien van chat ((xuc ban) OR (cuc ban)) thanh dai cua viet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky dang xa hoi. thien van chat ((xuc ban) OR (cuc ban)) thanh dai cua viet*.