Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
hanh trung » thanh trung, hanh trang, manh trung
hoc chieu » hoc thieu, ho chieu, hoc dieu
tuan dan » tuan dang, xuan dan, tran dang
dan dung » van dung, tin dung, ap dung
san toan » van toan, manh toan, xuan toan
dan toan » van toan, dan than, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chieu) or (hoc hien)) tinh - hanh trung tuan dan dung ((san toan) or (dan toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (hoc hien)) tinh - hanh trung tuan dan dung ((san toan) OR (dan toan)) ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (hoc hien)) tinh - hanh trung tuan dan dung ((san toan) or (dan toan)) ban*.