Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
thuat trong » thuat song
thieu tach » thien hach, chiet tach, chieu sach
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
van thanh » van tuan
ban thanh » ban hanh, 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 tach - hanh trinh thuat trong cong ((van thanh) or (ban thanh)) san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tach - hanh trinh thuat trong cong ((van thanh) OR (ban thanh)) san.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tach - hanh trinh thuat trong cong ((van thanh) or (ban thanh)) san*.