Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
truong cao » truong dai
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
manh toan » thanh toan, anh tuan, tinh toan
trung ha » trung hoc, trung tam, trung cap
toan ban » van 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 tinh - hanh ((trung ha) or (truong cao)) ((nhung cong) OR (thong cong)) manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - hanh ((trung ha) OR (truong cao)) ((nhung cong) OR (thong cong)) manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - hanh ((trung ha) or (truong cao)) ((nhung cong) OR (thong cong)) manh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - hanh ((trung ha) or (truong cao)) ((nhung cong) OR (thong cong)) manh toan ban*.