Perhaps you should try some spelling variations:
thong trong » thuong trong, thong thong, thong thuong
nhieu tang » chieu sang, nhiet nang
trong danh » trong doanh, truong danh, trong anh
hieu lang » chieu sang, hieu quang, hieu van
danh toan » manh toan, anh toan, dan toan
trung va » truong va, trang va, trung ha
tran van » luan van
toan ban » van ban

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: ho ((hieu lang) OR (nhieu tang)) - hanh ((trung va) OR (tran van)) thong trong danh toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (nhieu tang)) - hanh ((trung va) or (tran van)) thong trong danh toan ban~".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (nhieu tang)) - hanh ((trung va) or (tran van)) thong trong danh toan ban*.