Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
xay hanh » day nhanh, day thanh, xanh hanh
thuc xay » thuc day, tuc xay, thuat xay
nam thuc » nam thuoc, am thuc, nam thu
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty sang » ty xang, ty hang, duy sang
ma hoi » mai hoi, ma hoa, me hoi
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty sang ((ma hoi) or (xa hoi)). hieu van nam thuc xay hanh vai ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty sang ((ma hoi) OR (xa hoi)). hieu van nam thuc xay hanh vai ((cua te) OR (cua tu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty sang ((ma hoi) or (xa hoi)). hieu van nam thuc xay hanh vai ((cua te) OR (cua tu))*".