Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoc thieu » toc thieu, hoc hien
trung can » trung cap, trung van, trong can
bang cong » bang song, hang cong, dung cong
dang cong » dung cong
ho chieu » theo chieu, doi chieu, mot chieu
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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

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