Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
nhung huong » nhung phuong, nhung cong, nhung dung
nhung tuong » nhung phuong, hung vuong, nhung cong
hanh trinh » canh tranh, hanh chinh
thi chieu » thi chien, thi hieu, theo chieu
manh toan » thanh toan, anh tuan, tinh toan
theo chu » theo chieu, cho chu, chao chu
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: ((theo chu) OR (thi chieu)) sach - hanh trinh thuat ((nhung huong) OR (nhung tuong)) manh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chu) OR (thi chieu)) sach - hanh trinh thuat ((nhung huong) OR (nhung tuong)) manh toan cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chu) OR (thi chieu)) sach - hanh trinh thuat ((nhung huong) OR (nhung tuong)) manh toan cau*.