Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
hanh tram » hanh tam, hanh trang, thanh tran
ho chieu » theo chieu, doi chieu, mot chieu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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 thieu) or (ho chieu)) xanh - ((hanh tram) or (thanh toan)) he thong cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (ho chieu)) xanh - ((hanh tram) OR (thanh toan)) he thong cong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (ho chieu)) xanh - ((hanh tram) or (thanh toan)) he thong cong dan toan ban*.