Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
kinh vu » kinh ve, dinh vu, kinh va
va kinh » va tinh, qua kinh
cam luc » cam xuc, cau luc
su sach » so sach
hieu va » lieu va
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 » hu cua, tu cua

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) OR (hieu qua)) cam luc va kinh vu 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) OR (hieu qua)) cam luc va kinh vu 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) OR (hieu qua)) cam luc va kinh vu cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) y nang ma hoa. ((hieu va) OR (hieu qua)) cam luc va kinh vu cua triet*.