Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
cong thanh » dong thanh, cong trinh, cong tan
trinh thi » trinh tai, dinh thi, trinh tu
nang cong » nang song, dang cong, bang cong
thi nang » thi cong, ki nang, thi hanh
than tap » han tap, than cap, thanh lap
phan tap » phan lap, han tap, pha tap
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - hanh trinh thi nang cong thanh ((((than tap) or (phan tap))) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh trinh thi nang cong thanh ((((than tap) OR (phan tap))) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh trinh thi nang cong thanh ((((than tap) or (phan tap))) or (toan tap))*.