Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
hanh trinh » canh tranh, hanh chinh
hieu xanh » chieu xanh, hieu manh, hieu nganh
thanh lap » thanh san, phan lap, thanh hai
doc hieu » toc thieu, hoc thieu, hoc hien
trinh va » trinh van, trinh vat, trinh ve
than cap » khan cap, thanh cac, than cua
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh trinh va nhung huong dan ((((than cap) OR (thanh lap))) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh trinh va nhung huong dan ((((than cap) OR (thanh lap))) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh trinh va nhung huong dan ((((than cap) OR (thanh lap))) or (toan cao))*.