Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
thiet danh » thien danh, thien anh, thien dang
thanh chau » thanh cha, thanh cham, thanh chu
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trung cua » truong cua, trung tuan, trung cap
truong ca » truong cao, truong va, trong ca
cong ban » cong bang, cong san, cong tan
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 thiet danh - thanh ((trung cua) or (truong ca)) thuong cong ban ((thanh chau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet danh - thanh ((trung cua) OR (truong ca)) thuong cong ban ((thanh chau) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: hoc thiet danh - thanh ((trung cua) or (truong ca)) thuong cong ban ((thanh chau) or (than cap))*.