Perhaps you should try some spelling variations:
truong long » trong long, trung long, truong cong
hieu nganh » vien nganh, hiem ngan, hieu manh
hieu xanh » chieu xanh, hieu manh, dieu hanh
long tinh » cong tinh, trong tinh, luong tin
manh cua » doanh cua
toan ban » van ban
ban cua » ban quan

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)) - hanh ((manh cua) OR (ban cua)) truong long tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu nganh)) - hanh ((manh cua) OR (ban cua)) truong long tinh toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) or (hieu nganh)) - hanh ((manh cua) OR (ban cua)) truong long tinh toan ban*".