Perhaps you should try some spelling variations:
hoc thieu » hoc hien
manh cong » manh cuong, hanh cong, manh long
cong thuc » cong tac
thuc nang » chuc nang, thuc trang, thich nang
nang long » nang luong, nang song, nang dong
long tinh » cong tinh, trong tinh, luong tin
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 thuc nang long tinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) sang - manh cong thuc nang long tinh toan tap*.