Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
sach ky » sach y, sach ty, sach kem
cac dac » cac dan, cac dai, cac bac
dac van » cac van, dao van, dam van
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, dua tren
sac ky » cac ky, sai ky
ve cac » va cac, vien cac

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: thu ((sach ky) OR (sac ky)) nang xa hoi. hieu ve cac dac van hanh di ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) or (sac ky)) nang xa hoi. hieu ve cac dac van hanh di ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sac ky)) nang xa hoi. hieu ve cac dac van hanh di ((cua tre) OR (cua triet))*.