Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, thong cong, hang cong
hang cua » mang cua, huong cua, thong cua
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
hang ca » hang va, nang cao, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu nganh) or (chieu sang)) - hanh ((hang cua) or (hang ca)) nhung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu nganh) OR (chieu sang)) - hanh ((hang cua) OR (hang ca)) nhung cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu nganh) or (chieu sang)) - hanh ((hang cua) or (hang ca)) nhung cong tan toan cau*.