Perhaps you should try some spelling variations:
chiet tach » chieu sach
canh trinh » canh tranh, hanh trinh, canh tinh
thong cong » trong cong, tong cong, thong thong
lieu tinh » trieu tinh, diep tinh, bien tinh
trinh vat » trinh van, trinh luat, sinh vat
vat thong » va thong, vat trong, mat thong
cong tac » cong ty
tac chan » tac chuan, tac can, tac chon
chan tu » phan tu, han tu, chon 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)) - canh trinh vat thong cong tac chan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((lieu tinh) OR (chiet tach)) - canh trinh vat thong cong tac chan tu.
• Adding a wildcard symbol may retrieve word variants: ho ((lieu tinh) or (chiet tach)) - canh trinh vat thong cong tac chan tu*.