Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
truong cua » truong ca, truong quan, truong cao
hoc thiet » hoc thieu, hoc thuyet, toc thieu
trung cua » trung tuan, trung cap, dung cua
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cap » khan cap, thanh lap, thanh cac

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

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