Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc hanh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
ve cac » va cac, vien cac
de cua » te cua, dieu cua
le cua » ly cua

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 ky nang xa hoi. hieu ve cac ((thuc van) or (thuc va)) hanh ((de cua) OR (le cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ve cac ((thuc van) OR (thuc va)) hanh ((de cua) OR (le cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ve cac ((thuc van) or (thuc va)) hanh ((de cua) OR (le cua)) triet*".