Perhaps you should try some spelling variations:
danh lien » danh kien, danh dien, doanh tien
duoc tren » nuoc tren, thuoc tren, dua tren
dung tren » dung trong, dung trung
qua hai » qua hoat
hai xuc » hai cuc, hai xu, chat xuc
va danh » va dinh, va dan, va hanh
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
nang o » nang co, nang ho, nang ro
xuc va » duc va, tuc va, luc va
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: te sac ky nang o hoi. hieu qua hai xuc va danh lien ((duoc tren) or (dung tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang o hoi. hieu qua hai xuc va danh lien ((duoc tren) OR (dung tren)).
• Adding a wildcard symbol may retrieve word variants: te sac ky nang o hoi. hieu qua hai xuc va danh lien ((duoc tren) or (dung tren))*.