Perhaps you should try some spelling variations:
su sach » so sach, vu sach
va danh » va dinh, va hanh, dia danh
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ky sang » ky nang, ky dang, ky tang
ta hai » tai hai, tac hai, tra hai
ma hai » va hai, xa hai, manh hai
ve cam » ve cham, ve cac, va cam
va dan » ca dan, va dao, va dau
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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 ((ma hai) OR (ta hai)). hieu ve cam xuc ((va danh) or (va dan)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky sang ((ma hai) OR (ta hai)). hieu ve cam xuc ((va danh) OR (va dan)) vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky sang ((ma hai) OR (ta hai)). hieu ve cam xuc ((va danh) or (va dan)) vi cua tu".
• Adding a wildcard symbol may retrieve word variants: su sach ky sang ((ma hai) OR (ta hai)). hieu ve cam xuc ((va danh) or (va dan)) vi cua tu*.