Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
trinh han » trinh quan
han hanh » ban hanh, van hanh, han danh
nong dan » nong san, nguong dan, huong dan
cong dan » cong san, cong tan, huong dan
than tap » toan tap, han tap, phan tap

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 tinh - hanh trinh han hanh ((nong dan) or (cong dan)) than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - hanh trinh han hanh ((nong dan) OR (cong dan)) than tap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - hanh trinh han hanh ((nong dan) or (cong dan)) than tap*.