Perhaps you should try some spelling variations:
thieu lang » thieu khang, thieu quang, chieu sang
truong cua » truong quan, truong cao, huong cua
hieu lang » chieu sang, hieu quang, nhieu tang
truong ca » truong cao, truong va, trong ca
hang cong » dang cong, hang nong, bang cong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu lang) or (hieu lang)) - hanh ((truong cua) OR (truong ca)) hang cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu lang) OR (hieu lang)) - hanh ((truong cua) OR (truong ca)) hang cong tac toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu lang) or (hieu lang)) - hanh ((truong cua) OR (truong ca)) hang cong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu lang) or (hieu lang)) - hanh ((truong cua) OR (truong ca)) hang cong tac toan cao*.