Perhaps you should try some spelling variations:
ky dang » ky danh
hieu ve » hieu va, hieu van
duc van » duc va, duc manh, duc phan
anh tai » hanh tai, anh thai, vanh tai
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo
su sai » su tai, su hai, su dai
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ((ky dang) or (ky nang)) xa hoi. hieu ve cam ((duc van) OR (duc tan)) anh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ((ky dang) OR (ky nang)) xa hoi. hieu ve cam ((duc van) OR (duc tan)) anh tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ((ky dang) or (ky nang)) xa hoi. hieu ve cam ((duc van) OR (duc tan)) anh tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sai ((ky dang) or (ky nang)) xa hoi. hieu ve cam ((duc van) OR (duc tan)) anh tai cuu tre*.