Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve tham » va tham, ve cham, vi tham
thuc va » thuc vat, thuc dan
su viet » so viet
y nang » ky nang, ly nang, v nang
san su » dan su, van su, ban su

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang xa hoi. hieu ve tham ((thuc va) or (thuc day)) thanh san su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang xa hoi. hieu ve tham ((thuc va) OR (thuc day)) thanh san su viet.
• Adding a wildcard symbol may retrieve word variants: vu sach y nang xa hoi. hieu ve tham ((thuc va) or (thuc day)) thanh san su viet*.