Perhaps you should try some spelling variations:
nang xay » dang xay, nganh xay, nang xuan
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
loc van » luoc van, lo van, loc va
hoc van » hoc dan, hoc va, hoc vat
cua tre » cuu tre, cua triet, dua tren
tu van » tu va
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: tu van ky nang xay hoi. hieu va cac ((loc van) OR (hoc van)) hanh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu van ky nang xay hoi. hieu va cac ((loc van) OR (hoc van)) hanh vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu van ky nang xay hoi. hieu va cac ((loc van) OR (hoc van)) hanh vi ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu van ky nang xay hoi. hieu va cac ((loc van) OR (hoc van)) hanh vi ((cua tre) or (cua te))*.