Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
cam luc » cam xuc, cau luc
sua cua » sua chua, qua cua, lua cua
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
hieu ve » hieu van
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
hieu va » lieu va, hieu qua
ma hoi » mai hoi, xa hoi, ma hoa

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 ly nang ma hoi. ((hieu ve) or (hieu va)) cam luc ((ban hanh) or (van hanh)) sua cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang ma hoi. ((hieu ve) OR (hieu va)) cam luc ((ban hanh) OR (van hanh)) sua cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ly nang ma hoi. ((hieu ve) or (hieu va)) cam luc ((ban hanh) or (van hanh)) sua cua triet*.