Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thong tung » thong trung, thong dung, thong cung
trinh vat » trinh van, trinh luat, sinh vat
vat thong » va thong, vat trong, mat thong
tung manh » hung manh, duong manh, luong manh
hoi hieu » hoi phieu, hoi tieu, doi chieu
moi hieu » moi dieu, doi chieu, mot chieu
toan cao » toan tap
toan ban » van ban

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 tung manh ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoi hieu) OR (moi hieu)) lang - hanh trinh vat thong tung manh ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoi hieu) OR (moi hieu)) lang - hanh trinh vat thong tung manh ((toan cao) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ((hoi hieu) OR (moi hieu)) lang - hanh trinh vat thong tung manh ((toan cao) or (toan ban))*.