Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu lang » chieu sang, hieu quang, nhieu tang
anh dang » anh dong, anh dung, anh bang
dang cua » dung cua, dong cua, mang cua
ban cong » bang cong, van cong, phan cong
tac tren » rac tren, tai tren, tac truyen
tap tren » lap tren, tai tren, tap truyen

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 manh) or (hieu lang)) - anh dang cua ban cong ((tac tren) OR (tap tren)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (hieu lang)) - anh dang cua ban cong ((tac tren) OR (tap tren)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu manh) or (hieu lang)) - anh dang cua ban cong ((tac tren) OR (tap tren)) cau".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (hieu lang)) - anh dang cua ban cong ((tac tren) OR (tap tren)) cau*.