Perhaps you should try some spelling variations:
dung thong » dung thuong, dung trong, dong thong
hanh dinh » thanh dinh, hinh dinh, hanh tinh
chieu ca » chieu cao, chieu day, nhieu cau
thong va » trong va, thong cua, truong va
va thang » van thang, va thanh, va thong
thang ca » thang cua, hang ca, tang ca
hieu ca » hieu cac, hieu cua, hieu va
dinh su » dinh so, hinh su, dinh cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu ca) or (chieu ca)) - hanh dinh su dung thong va thang ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu ca) OR (chieu ca)) - hanh dinh su dung thong va thang ca.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu ca) or (chieu ca)) - hanh dinh su dung thong va thang ca*.