Perhaps you should try some spelling variations:
danh thai » anh thai, dinh thai, danh thanh
dang thai » dang thi, dang hai, dang khai
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cac » van cau, van bac, dan cac
van hac » van hoc, van ha, van hai
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. thi ((van cac) OR (van hac)) nuoc va ((danh thai) or (dang thai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. thi ((van cac) OR (van hac)) nuoc va ((danh thai) OR (dang thai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. thi ((van cac) OR (van hac)) nuoc va ((danh thai) or (dang thai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. thi ((van cac) OR (van hac)) nuoc va ((danh thai) or (dang thai)) cua tre*.