Perhaps you should try some spelling variations:
thieu lang » hieu lang, thieu khang, thieu quang
manh tuong » manh tung, manh cuong, minh tuong
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
tuong va » truong va, thuong va, luong va
tac toan » tap toan, hach toan, tich toan
tam toan » tap toan, tam than, pham toan

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 - manh tuong va nhung cong ((tac toan) or (tam toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu lang - manh tuong va nhung cong ((tac toan) OR (tam toan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu lang - manh tuong va nhung cong ((tac toan) or (tam toan)) cao*.