Perhaps you should try some spelling variations:
thanh nam » hanh nam, thanh tam, thanh pham
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
te sach » toc sach
nang co » nang cao, nang doc, nang noi
cau duc » cao duc, cau luc, cau truc
chu duc » thu duc, chua duoc, cuu duoc

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)) ky nang co hoc. hieu van ((cau duc) or (chu duc)) gia thanh nam cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang co hoc. hieu van ((cau duc) OR (chu duc)) gia thanh nam cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky nang co hoc. hieu van ((cau duc) or (chu duc)) gia thanh nam cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky nang co hoc. hieu van ((cau duc) or (chu duc)) gia thanh nam cua triet*.