Perhaps you should try some spelling variations:
lang duong » lang dong, lang muong, lang tuong
duong sinh » duong minh, duong manh, trong sinh
hoc thieu » hoc hien
manh cong » manh cuong, hanh cong, manh long
cong chuc » cong thuc, cong cu, cong cua
chuc lang » chuc nang, chuc cong, chi lang
sinh toan » tinh toan, hinh toan, minh toan
toan tap » toan ban

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) or (toc thieu)) sang - manh cong chuc lang duong sinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) sang - manh cong chuc lang duong sinh toan tap*.