Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
cua viet » ca viet, hoa viet, cua vat
danh bat » doanh bat, anh bai, dinh ba
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
thuc va » thuc dan, thuc day
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang noi
co hoi » co hoc, co loi
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 ky nang co hoi. hieu va am ((thuc va) OR (thuc vat)) danh bat ((cua viet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang co hoi. hieu va am ((thuc va) OR (thuc vat)) danh bat ((cua viet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang co hoi. hieu va am ((thuc va) OR (thuc vat)) danh bat ((cua viet) or (va triet))*".