Perhaps you should try some spelling variations:
thong cong » tong cong, thong thong, phong chong
hanh trinh » canh tranh, hanh chinh
hien manh » hien hanh, hieu manh, hien nhanh
tien manh » tien anh, tien thanh, tieng anh
trinh vat » trinh van, trinh luat, sinh vat
danh tuan » anh tuan, manh tuan, danh thanh
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien manh) OR (tien manh)) - hanh trinh vat ((thong cong) or (trong cong)) danh tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien manh) OR (tien manh)) - hanh trinh vat ((thong cong) OR (trong cong)) danh tuan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien manh) OR (tien manh)) - hanh trinh vat ((thong cong) or (trong cong)) danh tuan cau*".