Perhaps you should try some spelling variations:
su sach » so sach, vu sach
va danh » va dinh, va hanh, dia danh
ky sang » ky nang, ky dang, ky tang
lap hai » lap lai, lap hoat, lanh hai
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
cac xuc » cam xuc, cac nuoc, chat xuc
vi cua » vai cua, di cua
va dan » ca dan, va dao, va dau
ve cac » va cac, vien cac
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 ((lap hai) OR (lap tai)). hieu ve cac 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 ((lap hai) OR (lap tai)). hieu ve cac 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 ((lap hai) OR (lap tai)). hieu ve cac xuc ((va danh) or (va dan)) vi cua tu".
• Adding a wildcard symbol may retrieve word variants: su sach ky sang ((lap hai) OR (lap tai)). hieu ve cac xuc ((va danh) or (va dan)) vi cua tu*.