Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh ghep » trinh he, trinh nghe, trinh phap
nhanh tinh » nhanh thanh, nhan sinh
duy nhanh » duy khanh, day nhanh, duy anh
tinh nghe » trinh nghe, anh nghe, hanh nghe
so hanh » so sanh, so danh, co hanh
ghep tu » nghiep tu, ghep tuoi
tu hoc » te hoc
xu hoc » su hoc, xa hoc
du hoc » duoc hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so hanh trinh ghep tu hoc ) or ( duy nhanh tinh nghe ((xu hoc) OR (du hoc)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so hanh trinh ghep tu hoc ) OR ( duy nhanh tinh nghe ((xu hoc) OR (du hoc)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( so hanh trinh ghep tu hoc ) or ( duy nhanh tinh nghe ((xu hoc) OR (du hoc)) ))".
• Adding a wildcard symbol may retrieve word variants: (( so hanh trinh ghep tu hoc ) or ( duy nhanh tinh nghe ((xu hoc) OR (du hoc)) ))*.