Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
su triet » su viet, su tien, ve triet
tu sach » su sach, te sach, tu cach
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va

You may be able to get more results by adjusting your search query.

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