Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
canh manh » lanh manh, canh tranh, cach mang
nhung don » nhung van, nhung bo
ho chieu » theo chieu, hoc thieu, doi chieu
manh cua » doanh cua, ban cua
tam toan » tap toan, tam than, pham toan
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 (theo tieu)) sach - canh manh cua ((nhung don) or (thong cong)) tam toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo tieu)) sach - canh manh cua ((nhung don) OR (thong cong)) tam toan cau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo tieu)) sach - canh manh cua ((nhung don) or (thong cong)) tam toan cau*.