Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ban hanh » ban hang
vu dang » su dang, vu quang, cua dang
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
cam cuc » cam xuc, cham cuu, pham cuc
cuc ban » cua ban, cac ban, cuu ban
vu nang » vuc nang, va nang, v nang
hanh ki » hanh vi, hanh ky, hanh kien
su sach » so sach, vu sach
va cam » va cham, va cac, va cao
ki su » ky su

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 ((vu nang) or (vu dang)) mai hoi. hieu va cam cuc ban hanh ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((vu nang) OR (vu dang)) mai hoi. hieu va cam cuc ban hanh ki su triet.
• Adding a wildcard symbol may retrieve word variants: su sach ((vu nang) or (vu dang)) mai hoi. hieu va cam cuc ban hanh ki su triet*.