Perhaps you should try some spelling variations:
thuat sac » thuat sach, thuat san, thuat tac
thien van » thi van
cua triet » cua viet, su triet, va triet
van dung » van dong, tin dung
van dat » van dao, van dau, dan dat
hai cua » thai cua, dai cua, hoi cua
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sac ky nang x ho. thien van dat nuoc ((van dung) or (xay dung)) hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sac ky nang x ho. thien van dat nuoc ((van dung) OR (xay dung)) hai cua triet.
• Adding a wildcard symbol may retrieve word variants: thuat sac ky nang x ho. thien van dat nuoc ((van dung) or (xay dung)) hai cua triet*.