Perhaps you should try some spelling variations:
truong lop » truong hop, truong lon, truong long
thong cong » trong cong, tong cong, thong thong
trung dam » trung tam, trung dai, trong dam
dung cong » dung trong
chi xanh » chi anh, chi danh, chi hanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - thanh ((truong lop) or (trung dam)) ((dung cong) or (thong cong)) tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - thanh ((truong lop) OR (trung dam)) ((dung cong) OR (thong cong)) tan toan ban.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - thanh ((truong lop) or (trung dam)) ((dung cong) or (thong cong)) tan toan ban*.