Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh vai » danh sai, danh va, doanh van
thuc day » thuc dan, thuc vat
vai cua » dai cua, hai cua, lai cua
thuc va » thuc vat, thuc dan
tu sach » thu sach, te sach, tu cach
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang noi
su sach » so sach, vu sach
co loi » co hoi
va am » va lam, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) ky nang co loi. hieu va am ((thuc va) or (thuc day)) danh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang co loi. hieu va am ((thuc va) OR (thuc day)) danh vai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky nang co loi. hieu va am ((thuc va) or (thuc day)) danh vai cua triet*".