Perhaps you should try some spelling variations:
thuong van » thong van, truong van, thuong va
hanh dinh » thanh dinh, hinh dinh, hanh tinh
chieu day » chien dau, chieu cao, hieu dac
van thang » van thanh, van khang, van hang
dinh phi » dinh thi, dinh chi, dinh phu
phi hang » thi hang, phi hung, pham hang
thang ca » thang cua, hang ca, tang ca
hieu ca » hieu cac, hieu cua, hieu va

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 day)) - hanh dinh phi hang thuong van thang ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu ca) OR (chieu day)) - hanh dinh phi hang thuong van thang ca.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu ca) or (chieu day)) - hanh dinh phi hang thuong van thang ca*.