Perhaps you should try some spelling variations:
nhung cuong » nhung cong, hung cuong, nhung chong
hoc thieu » toc thieu
lanh manh » lanh tranh, lan anh, van manh
cua nhung » va nhung
cuong tap » luong tap, cong tac, luong tai
manh cua » doanh cua, ban cua
tap toan » tap doan, tap quan, bai toan
toan cau » toan cao, toan ban, toan tap
doi chi » doi khi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((hoc thieu) OR (hoc hien))) OR (doi chi)) tinh - lanh manh cua nhung cuong tap toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((hoc thieu) OR (hoc hien))) or (doi chi)) tinh - lanh manh cua nhung cuong tap toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((((hoc thieu) OR (hoc hien))) or (doi chi)) tinh - lanh manh cua nhung cuong tap toan cau*.