Perhaps you should try some spelling variations:
chai tuc » chai tu, thai tuc, thai thuc
cau tren » cu tren, dau tren, ca tren
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va chai » va cai, va chat, va cham
va hanh » van hanh, va thanh, va danh
su cac » su cao, su can, eu cac
tuc va » thuc va, truc va, tuc xa
vi cau » va cau, ve cau, di cau

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 chai tuc va hanh vi 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 chai tuc va hanh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: ((su cac) OR (tu cac)) ky nang ma hoa. hieu va chai tuc va hanh vi cau tren*.