Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh cua » manh cua, hang cua, hanh sua
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
ky tang » ky nang, ky dang, kho tang
ky sang » ky nang, ky dang, duy sang
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
cua su » qua su
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 sang) or (ky tang)) ma hoi. hieu ((ve cam) OR (ve cac)) xuc va hanh cua su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky sang) OR (ky tang)) ma hoi. hieu ((ve cam) OR (ve cac)) xuc va hanh cua su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky sang) or (ky tang)) ma hoi. hieu ((ve cam) OR (ve cac)) xuc va hanh cua su triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky sang) or (ky tang)) ma hoi. hieu ((ve cam) OR (ve cac)) xuc va hanh cua su triet*.