Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
canh tinh » hanh tinh, manh tinh, canh tranh
tu canh » thu canh, tu chanh, tu can
thi dia » thi dua, thi da, thi dieu
thi diu » thi dieu, thi dau, thi du
nha li » nha ly, nha lo, nhanh li
na li » nae li, va li
thuc » thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thuc hanh trinh ((nha li) OR (na li)) hoc ) or ( tu canh tinh ((thi dia) or (thi diu)) hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuc hanh trinh ((nha li) OR (na li)) hoc ) OR ( tu canh tinh ((thi dia) OR (thi diu)) hoc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thuc hanh trinh ((nha li) OR (na li)) hoc ) or ( tu canh tinh ((thi dia) or (thi diu)) hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( thuc hanh trinh ((nha li) OR (na li)) hoc ) or ( tu canh tinh ((thi dia) or (thi diu)) hoc ))*.