Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thong hung » thong huong, thong nhung, thuong hung
trinh vat » trinh van, trinh luat, sinh vat
manh toan » thanh toan, anh tuan, tinh toan
hoi hieu » hoi phieu, hoi tieu, doi chieu
moi hieu » moi dieu, doi chieu, mot 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: ((hoi hieu) OR (moi hieu)) lang - hanh trinh vat ((thong hung) or (thong thong)) manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoi hieu) OR (moi hieu)) lang - hanh trinh vat ((thong hung) OR (thong thong)) manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoi hieu) OR (moi hieu)) lang - hanh trinh vat ((thong hung) or (thong thong)) manh toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoi hieu) OR (moi hieu)) lang - hanh trinh vat ((thong hung) or (thong thong)) manh toan cau*.