Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
cong danh » cuong danh, cong dan, cong thanh
hoc hieu » hoc thieu, hoc hien, doc hieu
tung cap » trung cap, cung cap, thong cap
cap dung » ap dung, cao dung, chan dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - thanh tung cap dung cong danh ((toan ban) OR (van ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu lang - thanh tung cap dung cong danh ((toan ban) OR (van ban))".
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - thanh tung cap dung cong danh ((toan ban) OR (van ban))*.