Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh ca » hanh cac, hanh cat, hanh cua
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky dang, ky tang, duy sang
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
ca su » cua su, cao su, ca sau

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 nang)) mai hoi. hieu ((ve cam) or (ve cac)) xuc va hanh ca su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky sang) OR (ky nang)) mai hoi. hieu ((ve cam) OR (ve cac)) xuc va hanh ca su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky sang) OR (ky nang)) mai hoi. hieu ((ve cam) or (ve cac)) xuc va hanh ca su triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky sang) OR (ky nang)) mai hoi. hieu ((ve cam) or (ve cac)) xuc va hanh ca su triet*.