Perhaps you should try some spelling variations:
thien van » thi van
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van ban
te sach » toc sach
nang xa » nang x, lang xa, nang ma
van bac » van ban, van bao, van hac
van anh » van thanh, tuan anh, van minh
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang xa hoi. thien van bac duc ((van hanh) OR (van anh)) di ((cua triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. thien van bac duc ((van hanh) OR (van anh)) di ((cua triet) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. thien van bac duc ((van hanh) OR (van anh)) di ((cua triet) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. thien van bac duc ((van hanh) OR (van anh)) di ((cua triet) or (cuu tre))*.