Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
thuc nhung » phuc nhung, thu nhung, thuc chung
toan thuc » toan hoc, dan thuc, nhan thuc
cong tang » cong thang, cong lang, cong vang
ho chieu » hoc thieu, mot chieu, doi chieu
cong tan » cong tac, cong san, cong thanh
phan cac » nhan cach, phan dau, phan lap

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

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