Perhaps you should try some spelling variations:
thien van » thi van
dang thai » dang thi, dang khai, lang thai
thu sach » tu sach, thuat sach, thuoc sach
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
dang hai » dang khai, hang hai, dung hai
sach ky » sac ky, sach y, sach ty
van cac » van hac, van cau, van bac
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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 x hoi. thien van cac nuoc va ((dang thai) OR (dang hai)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang x hoi. thien van cac nuoc va ((dang thai) OR (dang hai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. thien van cac nuoc va ((dang thai) OR (dang hai)) cua tre*.