Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
vai cua » dai cua, hai cua, lai cua
dan vai » dan va, dan tai, dan vat
cac hoc » cach hoc, cac hop, bac hoc
hieu ve » hieu va, hieu van
te sach » toc sach
ma hoi » mai hoi, ma hoa, me hoi
ve cac » va cac, vien cac
va dan » ca dan, va dao, va dau

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) or (thuat sach)) ky nang ((ma hoi) or (xa hoi)). hieu ve cac hoc va dan vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuat sach)) ky nang ((ma hoi) OR (xa hoi)). hieu ve cac hoc va dan vai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuat sach)) ky nang ((ma hoi) or (xa hoi)). hieu ve cac hoc va dan vai cua triet*.