Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
canh manh » canh tranh, cach mang, van manh
lanh manh » lanh tranh, lan anh, van manh
cua nhung » va nhung
van toan » van tuan, van thanh, manh toan
van tan » van tuan, van ban, van tai

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