Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
cong tan » cong tac, cong san, cong thanh
tran cao » toan cao, tran chau, trang cho
manh va » hanh va, anh va, lanh va
minh va » tinh va, sinh va, sinh vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (theo chieu)) xanh - lanh ((manh va) OR (minh va)) thong cong tan tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo chieu)) xanh - lanh ((manh va) OR (minh va)) thong cong tan tran cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (theo chieu)) xanh - lanh ((manh va) OR (minh va)) thong cong tan tran cao".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo chieu)) xanh - lanh ((manh va) OR (minh va)) thong cong tan tran cao*.