Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chieu day » chien dau, chieu cao
hanh tang » hanh trang, anh tang, hanh mang
cua thong » cua thuong, cua khong, cua tong
hieu dac » hieu cac, bieu dac, hieu cach
tang cua » mang cua, hang cua, tang luan
tan toan » tap toan, van toan, dan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu day) or (hieu dac)) - hanh tang cua thong cong ((tan toan) OR (tan tran)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu day) OR (hieu dac)) - hanh tang cua thong cong ((tan toan) OR (tan tran)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu day) or (hieu dac)) - hanh tang cua thong cong ((tan toan) OR (tan tran)) tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu day) or (hieu dac)) - hanh tang cua thong cong ((tan toan) OR (tan tran)) tap*.