Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
xanh cua » manh cua, hanh cua, canh 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
anh cua » manh cua, hanh cua, canh cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) OR (chieu sang)) - hoang ((xanh cua) OR (anh cua)) nhung cong tan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (chieu sang)) - hoang ((xanh cua) OR (anh cua)) nhung cong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (chieu sang)) - hoang ((xanh cua) OR (anh cua)) nhung cong tan toan cau*.