Perhaps you should try some spelling variations:
lam truoc » lam thuoc, nam truoc, lam truong
thanh tai » thanh hai, thanh toan, doanh tai
truoc va » truc va, thuoc va, truong va
hanh tai » hang tai, han tai, hinh tai
bach vu » bach hue, bach nhu, bach qua
vu nang » vuc nang, va nang, vu dang
hieu da » hieu dac, hieu dia, hieu va
cua tre » cua te, cuu tre, cua triet
da lam » va lam
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach vu nang ((ma hoi) OR (xa hoi)). hieu da lam truoc va ((hanh tai) or (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach vu nang ((ma hoi) OR (xa hoi)). hieu da lam truoc va ((hanh tai) OR (thanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu bach vu nang ((ma hoi) OR (xa hoi)). hieu da lam truoc va ((hanh tai) or (thanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: vu bach vu nang ((ma hoi) OR (xa hoi)). hieu da lam truoc va ((hanh tai) or (thanh tai)) cua tre*.