Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu nganh » vien nganh, hiem ngan, hieu manh
nang thanh » dang thanh, tang thanh, nhanh thanh
hieu xanh » chieu xanh, hieu manh, dieu hanh
hang cong » dang cong, hang nong, bang cong
cong nang » cong ngang, cong lang, cong nong
trung va » truong va, trang va, trung ha
thanh tu » hanh tu, nhanh tu, thanh tung
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) OR (hieu nganh)) - thanh trung va hang cong nang thanh tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) OR (hieu nganh)) - thanh trung va hang cong nang thanh tu".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) OR (hieu nganh)) - thanh trung va hang cong nang thanh tu*.