Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
nhung huong » nhung phuong, nhung tuong, nhung dung
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
thi chieu » thi chien, thi hieu, theo chieu
minh toan » tinh toan, manh toan, minh tuan
ho chieu » theo chieu, hoc thieu, doi chieu
toan cau » toan cao, toan ban, toan tap

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

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