Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
ban hanh » ban hang
nang cai » nang cao, nang tai, nang cap
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
cai hoi » cau hoi, dai hoi, cai hoa
su sach » so sach, vu sach
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 ky nang cai hoi. hieu va cam luc ((ban hanh) or (va danh)) vai ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang cai hoi. hieu va cam luc ((ban hanh) OR (va danh)) vai ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang cai hoi. hieu va cam luc ((ban hanh) or (va danh)) vai ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang cai hoi. hieu va cam luc ((ban hanh) or (va danh)) vai ((cua triet) OR (va triet))*.