Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang vi » hang va, hanh vi, hang di
tuc ban » thuc ban, truc ban, tuc dan
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach vay
sach 2 » sach y
tu ban » thu ban, te ban
vi cua » vai cua, di cua
va cam » va cham, va cac, va cao

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 v) OR (sach 2)) nang xa hoi. hieu va cam ((tuc ban) OR (tu ban)) hang vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach v) or (sach 2)) nang xa hoi. hieu va cam ((tuc ban) OR (tu ban)) hang vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: vu ((sach v) or (sach 2)) nang xa hoi. hieu va cam ((tuc ban) OR (tu ban)) hang vi cua triet*.