Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc hanh, hoc van
thuc dan » thuc hanh, hoc dan, thuc vat
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc day
luu tre » luu tru, cuu tre, luy tre
y nang » ky nang, ly nang, v nang
va cau » van cau, va cac, va dau
vi luu » vi lua

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. lieu va cau ((((thuc van) OR (thuc dan))) or (thuc va)) hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang xa hoi. lieu va cau ((((thuc van) OR (thuc dan))) OR (thuc va)) hanh vi luu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang xa hoi. lieu va cau ((((thuc van) OR (thuc dan))) or (thuc va)) hanh vi luu tre*".