Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
thuat trong » thuat song
nhien lang » khien bang, hieu lang, nhan lang
hanh trinh » canh tranh, hanh chinh
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tap » toan ban
thien » thieu, tien, hien

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

• Performing a fuzzy search may retrieve terms with similar spellings: thien nhien lang - hanh trinh thuat trong cong dan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thien nhien lang - hanh trinh thuat trong cong dan ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: thien nhien lang - hanh trinh thuat trong cong dan ((toan cao) or (toan tap))*.