Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
thanh dung » thanh duong, thanh tung, thanh hung
hien manh » hien hanh, tien manh, hieu manh
cua trong » cua truong, cua trung, qua trong
dung cua » dung luan, dung cho
cong ban » cong bang, cong san, cong tan
than cau » phan cau, than cap, thanh chau
toan cau » 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: hoc ((hien manh) or (hieu nganh)) - thanh dung cua trong cong ban ((than cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien manh) OR (hieu nganh)) - thanh dung cua trong cong ban ((than cau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: hoc ((hien manh) or (hieu nganh)) - thanh dung cua trong cong ban ((than cau) or (toan cau))*.