Perhaps you should try some spelling variations:
dong trong » duong trong, dung trong, cong trong
luan dong » luan cong, quan dong, luan nong
trong san » trong cac, cong san, dong san
chu manh » ho manh, chu van, thu minh
anh dung » anh dong, anh huong, sach dung
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap
chu han » chu van

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu manh) OR (chu han)) - anh dung luan dong trong san ((toan tai) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu manh) OR (chu han)) - anh dung luan dong trong san ((toan tai) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: theo ((chu manh) OR (chu han)) - anh dung luan dong trong san ((toan tai) or (toan cao))*.