Perhaps you should try some spelling variations:
sang tao » hang tai
hanh vai » hanh va, hanh tai, hanh van
ky sang » ky nang, ky dang, ky tang
tao hoi » tao khoi, tao boi, tay hoi
hieu ve » hieu van
hieu va » lieu va, hieu qua
duc van » duc va, duc tan, duc manh
cu tren » tu tren, dua tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky sang tao hoi. ((hieu ve) OR (hieu va)) pham duc van ((hanh vai) or (hanh vi)) cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky sang tao hoi. ((hieu ve) OR (hieu va)) pham duc van ((hanh vai) OR (hanh vi)) cu tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky sang tao hoi. ((hieu ve) OR (hieu va)) pham duc van ((hanh vai) or (hanh vi)) cu tren*".