Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
lang tuan » lang xuan, quang tuan, hoang tuan
khoa hat » hoa hat, khoa kham, khoa than
tuan cau » toan cau, quan cau, tuan cu
khoa ha » khoa ma, khoa he, hoa ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((khoa ha) or (khoa hat)) tinh - hanh trinh thuat ((nhung cong) OR (thong cong)) lang tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((khoa ha) OR (khoa hat)) tinh - hanh trinh thuat ((nhung cong) OR (thong cong)) lang tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((khoa ha) or (khoa hat)) tinh - hanh trinh thuat ((nhung cong) OR (thong cong)) lang tuan cau".
• Adding a wildcard symbol may retrieve word variants: ((khoa ha) or (khoa hat)) tinh - hanh trinh thuat ((nhung cong) OR (thong cong)) lang tuan cau*.