Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
trinh ve » trinh he, trinh va, trinh vi
ve nhung » va nhung, tu nhung
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)) - hanh trinh ve nhung cong tac chan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((lieu tinh) OR (chiet tach)) - hanh trinh ve nhung cong tac chan tu.
• Adding a wildcard symbol may retrieve word variants: ho ((lieu tinh) or (chiet tach)) - hanh trinh ve nhung cong tac chan tu*.