Perhaps you should try some spelling variations:
thuat sach » thuat lanh
thien van » thi van
thuat san » thuat toan, thuat song, thuat lanh
thai cua » than cua, tai cuc, tri cua
van hoc » van hoa
hoc luc » hoc duc, hoc lua, coc luc
cua tre » cua te, cuu tre, cua triet
va dan » ca dan, va dau, va dap
va dao » ca dao
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: ((thuat sach) or (thuat san)) ky nang x hoi. thien van hoc luc ((va dan) OR (va dao)) thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (thuat san)) ky nang x hoi. thien van hoc luc ((va dan) OR (va dao)) thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) or (thuat san)) ky nang x hoi. thien van hoc luc ((va dan) OR (va dao)) thai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (thuat san)) ky nang x hoi. thien van hoc luc ((va dan) OR (va dao)) thai cua tre*.