Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » thong cong, hang cong, nhung don
thanh toan » thanh hoa, thanh san, tinh toan
hoc thiet » hoc thieu, hoc thuyet, toc thieu
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thiet) or (hoc hien)) tinh - thanh trung cua ((nhung cong) OR (dung cong)) thanh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (hoc hien)) tinh - thanh trung cua ((nhung cong) OR (dung cong)) thanh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thiet) or (hoc hien)) tinh - thanh trung cua ((nhung cong) OR (dung cong)) thanh toan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (hoc hien)) tinh - thanh trung cua ((nhung cong) OR (dung cong)) thanh toan ban*.