Perhaps you should try some spelling variations:
thiet nhung » tuyet nhung, thi nhung, biet nhung
trinh thiet » trinh viet, trinh thi
hanh trinh » canh tranh, hanh chinh
thi chieu » thi chien, thi hieu, theo chieu
cong manh » duong manh, cong thanh, hoang manh
cong danh » cuong danh, cong dan, cong thanh
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 thiet nhung ((cong manh) OR (cong danh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chu) OR (thi chieu)) sach - hanh trinh thiet nhung ((cong manh) OR (cong danh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chu) or (thi chieu)) sach - hanh trinh thiet nhung ((cong manh) OR (cong danh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chu) or (thi chieu)) sach - hanh trinh thiet nhung ((cong manh) OR (cong danh)) toan cau*.