Perhaps you should try some spelling variations:
dang thai » dang thi, dang khai, lang thai
thuoc sac » thuoc sach, thuoc dac, thuoc sai
dang hai » dang khai, hang hai, dung hai
nang xa » nang x, lang xa, nang ma
van bac » van ban, van hac, dan bac
van bao » van ban, van dao
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

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

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