Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu hach » thien hach, chieu sach, hieu cach
tran thong » toan thong, tran trong, tran phong
hoc thieu » toc thieu, hoc hien
tran hong » tran hoang, tran trong, tranh hang
cong tac » cong ty
quan cau » quang cao, toan cau, quan ha

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 hach - thanh trung ((tran thong) or (tran hong)) cong tac quan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu hach - thanh trung ((tran thong) OR (tran hong)) cong tac quan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu hach - thanh trung ((tran thong) or (tran hong)) cong tac quan cau*.