Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
vi su » va su, ve su, ki su

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

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