Perhaps you should try some spelling variations:
vanh tai » van tai, hanh tai, vanh dai
ky dang » ky danh
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
anh tai » hanh tai, anh thai, xanh tai
buu tre » cuu tre
su sai » su tai, su hai, su dai
va cam » va cham, va cac, va cao

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