Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh tai » thanh hai, thanh toan, doanh tai
hanh tai » hang tai, han tai, hinh tai
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
ve am » va am

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky lang xa hoi. hieu ve am ((hoc dan) OR (thuc vat)) ((hanh tai) OR (thanh tai)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky lang xa hoi. hieu ve am ((hoc dan) or (thuc vat)) ((hanh tai) OR (thanh tai)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang xa hoi. hieu ve am ((hoc dan) or (thuc vat)) ((hanh tai) OR (thanh tai)) cua triet*.