Perhaps you should try some spelling variations:
anh thai » anh thi, nhanh thai, tranh thai
ky dang » ky danh
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
duc van » duc va, duc tan, duc manh
anh tai » hanh tai, vanh tai, xanh tai
buu tre » cuu tre
su hai » su tai

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

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