Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang doi » hang di, hang loi, huong doi
sach ky » sac ky, sach y, sach ty
hanh di » hanh vi, hanh de, hang di
tuc van » thuc van, truc van, tuc va
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai

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 hoi. hieu ((ve cam) OR (ve cac)) tuc van ((hanh di) or (hang doi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ((ve cam) OR (ve cac)) tuc van ((hanh di) OR (hang doi)) cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((ve cam) OR (ve cac)) tuc van ((hanh di) or (hang doi)) cua triet*".