Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cac luc » cau luc, coc luc, cac nuoc
luc van » luoc van, luu van, duc van
lai cua » dai cua, hai cua, lai chau

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 2) OR (sach y)) nang ma hoa. hieu va cac luc van hanh lai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach 2) OR (sach y)) nang ma hoa. hieu va cac luc van hanh lai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach 2) OR (sach y)) nang ma hoa. hieu va cac luc van hanh lai cua triet*.