Perhaps you should try some spelling variations:
nang giau » nang giao, nang dau, dang giao
lam thuoc » nam thuoc, am thuc, cay thuoc
giau cuu » giau cua, gian cua, gia cua
van nang » van quang, van ban, van dong
hieu van » hieu va, thien van, lieu va
cuu tre » cua tre, cau tren, cau treo
lam tuc » lam truoc, luat tuc, nam thuc
mai hoi » mai khoi, lai hoi, mai doi
dai hoi » dai hoc, dai hai, dai moi
ky sang » ky nang, ky dang, ky tang
ban ky » van ky, dan ky
vu ban » tu ban, va ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ban ky sang ((mai hoi) or (dai hoi)). hieu van ((lam tuc) OR (lam thuoc)) van nang giau cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ban ky sang ((mai hoi) OR (dai hoi)). hieu van ((lam tuc) OR (lam thuoc)) van nang giau cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ban ky sang ((mai hoi) or (dai hoi)). hieu van ((lam tuc) OR (lam thuoc)) van nang giau cuu tre".
• Adding a wildcard symbol may retrieve word variants: vu ban ky sang ((mai hoi) or (dai hoi)). hieu van ((lam tuc) OR (lam thuoc)) van nang giau cuu tre*.