Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hieu cach » hieu cac, chieu sach, hieu ca
hien hanh » dieu hanh
trang cua » tranh cua, tang cua, trung cua
cua thong » cua thuong, cua khong, cua tong
cong anh » cong danh, dong anh, cong thanh
hong anh » hoang anh, hong hanh, dong anh
tuan cao » toan cao, juan cao, quang cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu cach) or (hien hanh)) - hanh trang cua thong ((cong anh) OR (hong anh)) tuan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu cach) OR (hien hanh)) - hanh trang cua thong ((cong anh) OR (hong anh)) tuan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu cach) or (hien hanh)) - hanh trang cua thong ((cong anh) OR (hong anh)) tuan cao*".