Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
trung chan » trong chan, trung can, trung nhan
trung phan » trung thanh, trung ha, dung phan
ho chieu » hoc thieu, doi chieu, mot chieu
cac toan » cac khoan, hach toan, cac thanh
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (theo chieu)) xanh - thanh ((trung chan) or (trung phan)) dung trong cac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) xanh - thanh ((trung chan) OR (trung phan)) dung trong cac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chieu)) xanh - thanh ((trung chan) or (trung phan)) dung trong cac toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (theo chieu)) xanh - thanh ((trung chan) or (trung phan)) dung trong cac toan cau*.