Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoang ban » hoang van, hang ban, hoang bao
cua thong » cua thuong, cua khong, suat thong
duong dan » duong dang, huong dan, duong van
dan khanh » dang khanh, van khanh, dat khanh
khanh cac » hanh cac, thanh cac, phan cac
hoc hieu » hoc thieu, hoc hien, doc hieu
cua tong » cua cong, cua dong, cua nong

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 - hoang ban ((cua thong) or (cua tong)) duong dan khanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hoang ban ((cua thong) OR (cua tong)) duong dan khanh cac*.