Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
phan duc » pham duc, phan tu, phan dau
hoc sach » hoc sinh, hoc cac, hoc anh
than duc » tran duc, than doc, than luc
sach ky » sac ky, sach y, sach ty
hanh di » hanh vi, hanh de, hang di
di cua » dai cua, doi cua, de cua
o hoc » co hoc, mo hoc, so hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky nang ((o hoc) or (xa hoi)). lieu va ((than duc) OR (phan duc)) ban hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky nang ((o hoc) OR (xa hoi)). lieu va ((than duc) OR (phan duc)) ban hanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky nang ((o hoc) or (xa hoi)). lieu va ((than duc) OR (phan duc)) ban hanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang ((o hoc) or (xa hoi)). lieu va ((than duc) OR (phan duc)) ban hanh di cua triet*.