Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh tai » doanh tai, dinh tai, hanh tai
tai cua » thai cua, tai cuc, tri cua
thuc va » thuc dan, thuc day
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, te sach
nang o » nang co, nang ho, nang ro
tu sac » tu cac, tu san, tu bac
o hoi » co hoi, o hoc, o hai
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) OR (tu sach)) ky nang o hoi. hieu ve am ((thuc va) or (thuc vat)) danh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky nang o hoi. hieu ve am ((thuc va) OR (thuc vat)) danh tai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu sach)) ky nang o hoi. hieu ve am ((thuc va) or (thuc vat)) danh tai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu sach)) ky nang o hoi. hieu ve am ((thuc va) or (thuc vat)) danh tai cua triet*.