Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tinh tap » tinh tai, tinh tay, tinh toan
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
hau duc » huu duc, ha duc, pham duc
va tinh » may tinh
tap cua » tap quan, tiep cua
va hau » van hau, va chau, vat hau
o hoc » mo hoc, so hoc, y hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang ((o hoc) or (co hoc)). hieu va hau duc va tinh tap cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((o hoc) OR (co hoc)). hieu va hau duc va tinh tap cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((o hoc) or (co hoc)). hieu va hau duc va tinh tap cua triet*.