Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tinh hoi » trinh hoi, tinh hoc, tinh hai
thuc day » thuc dan, thuc vat
hoi cua » hoi chuc
thuc va » thuc vat, thuc dan
va cham » va chat, va tham
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
te sac » te cac, te san

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

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