Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
hanh trinh » canh tranh, hanh chinh
chieu sang » chieu sach, chieu xanh, hieu lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
tong cong » cong cong, dung cong, dang cong
tran chau » tranh chap, tran huu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu manh) or (chieu sang)) - hanh trinh thuat ((tong cong) or (trong cong)) tan tran chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu manh) OR (chieu sang)) - hanh trinh thuat ((tong cong) OR (trong cong)) tan tran chau.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu manh) or (chieu sang)) - hanh trinh thuat ((tong cong) or (trong cong)) tan tran chau*.