Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh doi » thanh loi, thanh moi, thanh do
dang van » hoang van, hang va
doi cua » dai cua, hoi cua
thuc va » thuc dan, thuc day
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((nang xa) or (dang van)) hoi. hieu va cac ((thuc va) or (thuc vat)) thanh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (dang van)) hoi. hieu va cac ((thuc va) OR (thuc vat)) thanh doi cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) or (dang van)) hoi. hieu va cac ((thuc va) or (thuc vat)) thanh doi cua triet*.