Perhaps you should try some spelling variations:
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
hai luc » hai cuc, khai luoc, nhan luc
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
va hai » van hai, va chai, va khai
luc va » duc va, tuc va, loc va
ve cau » ke cau, va cau, le cau
ve cac » va cac, vien cac
su cac » su cao, su can, eu cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su cac) or (tu cac)) ky sang ma hoa. hieu va hai luc va hanh ((ve cau) or (ve cac)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su cac) OR (tu cac)) ky sang ma hoa. hieu va hai luc va hanh ((ve cau) OR (ve cac)) tren.
• Adding a wildcard symbol may retrieve word variants: ((su cac) or (tu cac)) ky sang ma hoa. hieu va hai luc va hanh ((ve cau) or (ve cac)) tren*.