Perhaps you should try some spelling variations:
tuong dan » huong dan, tung dan, xuong dan
trong san » trong cac, cong san, dong san
doc hieu » toc thieu, hoc thieu, hoc hien
tung dap » tung dan, trung dai, tuong dao
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap
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) or (doc hieu)) sang - thanh ((tung dap) OR (tuong dan)) dung trong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chi) OR (doc hieu)) sang - thanh ((tung dap) OR (tuong dan)) dung trong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chi) or (doc hieu)) sang - thanh ((tung dap) OR (tuong dan)) dung trong san toan cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chi) or (doc hieu)) sang - thanh ((tung dap) OR (tuong dan)) dung trong san toan cau*.