Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
thieu sach » chieu sach, thien hach, hieu cach
hanh trinh » canh tranh, hanh chinh
chuan dung » chan dung, chuyen dung, chua dong
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
san than » sang than, san thanh, van than
ban than » ban thanh, van thanh, ban hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - hanh trinh chuan dung cong ((san than) OR (ban than)) tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh trinh chuan dung cong ((san than) OR (ban than)) tap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trinh chuan dung cong ((san than) OR (ban than)) tap*.