Perhaps you should try some spelling variations:
truong cong » trong cong, truong dong, truong long
thanh trung » thanh tung
hanh trang » canh tranh, hanh trinh, minh trang
cua truong » cua trung, xuan truong, cac truong
doi chieu » doi chi, ho chieu, mot chieu
doc hieu » toc thieu, hoc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan cau » phan dau, phan cac, phan tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (doc hieu)) tinh - ((hanh trang) or (thanh trung)) cua truong cong tan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) tinh - ((hanh trang) OR (thanh trung)) cua truong cong tan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) tinh - ((hanh trang) or (thanh trung)) cua truong cong tan phan cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) tinh - ((hanh trang) or (thanh trung)) cua truong cong tan phan cau*.