Perhaps you should try some spelling variations:
hieu va » lieu va, hieu qua
lam xuc » cam xuc, lam duoc
va hanh » van hanh, va thanh, va danh
hanh de » hanh ve, hanh kem
cua tre » cua te, cuu tre, cua triet
va lam » van lam, va lap
xuc va » duc va, tuc va, luc va
de cua » le cua, te cua, dieu cua
o hoi » co hoi, o hoc, o hai

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 y) or (cac ky)) nang ((xa hoi) or (o hoi)). hieu va lam xuc va hanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (cac ky)) nang ((xa hoi) OR (o hoi)). hieu va lam xuc va hanh de cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (cac ky)) nang ((xa hoi) or (o hoi)). hieu va lam xuc va hanh de cua tre*.