Perhaps you should try some spelling variations:
ve triet » va trien, su triet
quan cau » quang cao, toan cau, quan ha
sach ty » sach y, sach tu, sach thu
dang xa » dang xay, lang xa, dang ha
sach ky » sac ky, sach y, sach kem
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
qua ca » qua cac, qua cua, qua cai
va ve » va de, va le, va vi

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: su ((sach ky) OR (sach ty)) dang xa hoi. hieu ((quan cau) OR (qua ca)) truc va hanh va ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach ty)) dang xa hoi. hieu ((quan cau) or (qua ca)) truc va hanh va ve triet~".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach ty)) dang xa hoi. hieu ((quan cau) or (qua ca)) truc va hanh va ve triet*.