Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
lieu tinh » trieu tinh, diep tinh, bien tinh
trinh vat » trinh van, trinh luat, sinh vat
vat trong » viet trong, cay trong, dot trong
cong tac » cong ty
tac can » tac van, tac quan, tac vang
can tu » ban tu, van tu, han tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((lieu tinh) or (chiet tach)) - hanh trinh vat trong cong tac can tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((lieu tinh) OR (chiet tach)) - hanh trinh vat trong cong tac can tu.
• Adding a wildcard symbol may retrieve word variants: ho ((lieu tinh) or (chiet tach)) - hanh trinh vat trong cong tac can tu*.