Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
cua nhung » va nhung
tung cua » trung cua, tuong cua, dung cua
dan toan » van toan, dan than, manh toan

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 - thanh tung cua nhung cong ((xuan toan) or (dan toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - thanh tung cua nhung cong ((xuan toan) OR (dan toan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - thanh tung cua nhung cong ((xuan toan) or (dan toan)) cao*.