Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cau tren » cu tren, dau tren, ca tren
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
hai xuc » hai cuc, hai xu, chat xuc
va hanh » van hanh, va danh, ban hanh
su cac » su cao, su can, eu cac
va hai » van hai, va chai, va khai
ve cau » ke cau, va cau, ve 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 nang ma hoa. hieu va hai xuc ((va hanh) OR (va thanh)) ve cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su cac) OR (tu cac)) ky nang ma hoa. hieu va hai xuc ((va hanh) OR (va thanh)) ve cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su cac) or (tu cac)) ky nang ma hoa. hieu va hai xuc ((va hanh) OR (va thanh)) ve cau tren".
• Adding a wildcard symbol may retrieve word variants: ((su cac) or (tu cac)) ky nang ma hoa. hieu va hai xuc ((va hanh) OR (va thanh)) ve cau tren*.