Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu tinh » trieu tinh, chieu tinh, thien tinh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
thanh lap » thanh san, thanh hai, thanh van
cong san » cong tac
phan lap » phan dau

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 tinh - ((thanh trung) OR (hanh trinh)) va nhung cong san ((thanh lap) OR (phan lap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - ((thanh trung) or (hanh trinh)) va nhung cong san ((thanh lap) OR (phan lap))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - ((thanh trung) or (hanh trinh)) va nhung cong san ((thanh lap) OR (phan lap))*.