Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc day » thuc dan, thuc vat
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan
danh va » doanh va, hanh va, anh va
nang o » nang co, nang ho, nang ro
va cua » va chua, via cua, ca cua
o hoi » co hoi, o hoc, o hai
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 o hoi. hieu va am ((thuc va) or (thuc day)) danh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang o hoi. hieu va am ((thuc va) OR (thuc day)) danh va cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang o hoi. hieu va am ((thuc va) or (thuc day)) danh va cua triet*.