Perhaps you should try some spelling variations:
quan trong » gian trong
nhung chi » chung chi, nhung chu, nhung thi
quen vang » que van, que lang, quen hanh
biet quan » viet quan, bien quang, viet quang
trong ban » trong san, trong tan, trong quan
quan van » luan van, quan va, quan luan
ban hang » ngan hang
phung » phuong, chung, phong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((phung thi) or (nhung chi)) ((quen vang) or (quan van)). biet quan trong ban hang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((phung thi) OR (nhung chi)) ((quen vang) OR (quan van)). biet quan trong ban hang.
• Adding a wildcard symbol may retrieve word variants: ((phung thi) or (nhung chi)) ((quen vang) or (quan van)). biet quan trong ban hang*.