Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hanh vai » hanh vi, hanh va, hanh tai
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
cua tre » cuu tre, cua triet, dua tren
te sac » te sach, te cac, te san
soc va » loc va, doc va, goc va
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky dang xay hoi. hieu va tham ((soc va) or (hoc va)) hanh vai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky dang xay hoi. hieu va tham ((soc va) OR (hoc va)) hanh vai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky dang xay hoi. hieu va tham ((soc va) or (hoc va)) hanh vai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sac ky dang xay hoi. hieu va tham ((soc va) or (hoc va)) hanh vai ((cua tre) OR (cua te))*.