Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc nhieu » hoc thieu, hop nhieu, hoc nghien
hoc nhiet » hoc thiet, hoc nghien, hoc hien
trang cua » tang cua, trung cua, thang cua
tranh cua » doanh cua, manh cua
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
toan cau » 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 nhieu) or (hoc nhiet)) tang - hanh ((trang cua) OR (tranh cua)) nhung cong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc nhieu) OR (hoc nhiet)) tang - hanh ((trang cua) OR (tranh cua)) nhung cong manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc nhieu) or (hoc nhiet)) tang - hanh ((trang cua) OR (tranh cua)) nhung cong manh toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc nhieu) or (hoc nhiet)) tang - hanh ((trang cua) OR (tranh cua)) nhung cong manh toan cau*.