Perhaps you should try some spelling variations:
bach tuoc » sach duoc, sach nuoc
dang thai » dang hai, dang khai, lang thai
thien van » thi van
dang thi » hoang thi, dang khoi
van bach » van bac, van hach, van sach
thu sach » thuat sach, thuoc sach, thu hoach
tuoc va » thuoc va, nuoc va, duoc va
tu sach » su sach, te sach, tu cach
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) or (tu sach)) ky nang x hoi. thien van bach tuoc va ((dang thai) OR (dang thi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ky nang x hoi. thien van bach tuoc va ((dang thai) OR (dang thi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (tu sach)) ky nang x hoi. thien van bach tuoc va ((dang thai) OR (dang thi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) ky nang x hoi. thien van bach tuoc va ((dang thai) OR (dang thi)) cua tre*.