Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
thuc dan » thuc hanh, hoc dan, thuc vat
danh sai » dung sai, danh bat, danh dau
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc day
van am » van nam, van lam, van dam
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu van am ((thuc va) or (thuc dan)) ((doanh van) or (danh sai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu van am ((thuc va) OR (thuc dan)) ((doanh van) OR (danh sai)) cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu van am ((thuc va) or (thuc dan)) ((doanh van) or (danh sai)) cua triet*.