Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, tu cach
te sach » toc sach
nang xa » nang x, lang xa, nang ma
lieu ca » lieu cao, lieu va, lieu ma
duc ban » duc tan, dua ban, duc man
duc van » duc va, duc tan, duc manh
hai cua » thai cua, dai cua, hoi cua
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: ((tu sach) or (te sach)) y nang xa hoi. lieu ca dao ((duc ban) OR (duc van)) thanh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang xa hoi. lieu ca dao ((duc ban) OR (duc van)) thanh hai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) y nang xa hoi. lieu ca dao ((duc ban) OR (duc van)) thanh hai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y nang xa hoi. lieu ca dao ((duc ban) OR (duc van)) thanh hai cua triet*.