Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
thien van » thi van
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
danh tri » dinh tri, thanh tri, danh thin
tu sach » thu sach, su sach, te sach
van cac » van hac, van cau, van bac
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
x hoi » o hoi, x ho, 5 hoi

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

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