Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
trinh vat » trinh van, trinh luat, sinh vat
hang long » thang long, hoang long, hang luong
long tinh » cong tinh, trong tinh, luong tin
doc hieu » toc thieu, hoc thieu, hoc hien
toan ban » van ban
tinh va » tich va, trinh van, tinh gia

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 - thanh ((tinh va) or (trinh vat)) hang long tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh ((tinh va) OR (trinh vat)) hang long tinh toan ban.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh ((tinh va) or (trinh vat)) hang long tinh toan ban*.