Perhaps you should try some spelling variations:
va kinh » va tinh, qua kinh
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
su sach » so sach
nang ma » tang ma, sang ma, nang cao
vu sach » vu bach, vu khach
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
vu cua » tu cua
hu cua » tu cua
va cam » va cham, va cac, va cao

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) or (vu sach)) y nang ma hoa. hieu va cam luc va kinh ((vu cua) OR (hu cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) y nang ma hoa. hieu va cam luc va kinh ((vu cua) OR (hu cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) y nang ma hoa. hieu va cam luc va kinh ((vu cua) OR (hu cua)) triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) y nang ma hoa. hieu va cam luc va kinh ((vu cua) OR (hu cua)) triet*.