Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, chong cong
chieu day » chien dau, chieu cao, hieu dac
hanh hang » thanh hang, hang hang, hanh han
hieu cac » hieu luc, hieu va, hieu van
ca khong » cat khong, cua khong, va khong
tan toan » tap toan, van toan, dan toan
hang ca » hang va, nang cao, hang tai

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 cac)) - hanh hang ca khong 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 cac)) - hanh hang ca khong cong ((tan toan) OR (tan tran)) tap.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu day) or (hieu cac)) - hanh hang ca khong cong ((tan toan) or (tan tran)) tap*.