Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
trang vap » trang va, trang vai, tran van
trang van » tran van, trang va, trong van
cong tan » cong tac, cong san, cong thanh
toan cau » toan ban, toan tap, toan tai
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 xanh - hanh ((trang vap) OR (trang van)) nhung cong tan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((trang vap) OR (trang van)) nhung cong tan ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh ((trang vap) OR (trang van)) nhung cong tan ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((trang vap) OR (trang van)) nhung cong tan ((toan cau) or (toan cao))*.