Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
hanh hai » thanh hai, nhanh hai, hang hai
ban hanh » ban hang
ve cham » va cham, ve chat, vu cham
xuc ban » duc ban, cuc ban, quoc ban
tu cach » tu cac
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
ve cam » ve cac, va cam, ve cai
hai va » hai van, thai va, hoi va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) ky nang xa hoi. hieu ((ve cam) OR (ve cham)) xuc ban hanh hai va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky nang xa hoi. hieu ((ve cam) OR (ve cham)) xuc ban hanh hai va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (su sach)) ky nang xa hoi. hieu ((ve cam) OR (ve cham)) xuc ban hanh hai va trien".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky nang xa hoi. hieu ((ve cam) OR (ve cham)) xuc ban hanh hai va trien*.