Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
van hoi » van hoc, van hoe, van loi
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang ((van hoi) OR (van hoa)). ((hieu ve) or (hieu qua)) cam duc van hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((van hoi) OR (van hoa)). ((hieu ve) OR (hieu qua)) cam duc van hanh vi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((van hoi) OR (van hoa)). ((hieu ve) or (hieu qua)) cam duc van hanh vi cuu tre*".