Perhaps you should try some spelling variations:
manh truong » manh trung, manh tuong, anh truong
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
cong tinh » cong trinh, cong vinh, long tinh
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu sach) OR (thien hach)) - ((manh truong) OR (hanh trinh)) va nhung cong tinh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu sach) OR (thien hach)) - ((manh truong) or (hanh trinh)) va nhung cong tinh toan cau~".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu sach) OR (thien hach)) - ((manh truong) or (hanh trinh)) va nhung cong tinh toan cau*.