Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
vu sach » vu bach, su sach, vu khach
sach ly » sach y, sach lo, sach ty
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cua tre, cau tren, cau treo
van hac » van hoc, van ha, van hai
thi van » thi lan, thi hanh, thi nang
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
tuc va » truc va, tuc xa, duc va

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 ly nang xa hoi. thi van hac ((tuc va) OR (thuc va)) hanh vi ((va triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ly nang xa hoi. thi van hac ((tuc va) OR (thuc va)) hanh vi ((va triet) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ly nang xa hoi. thi van hac ((tuc va) OR (thuc va)) hanh vi ((va triet) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: vu sach ly nang xa hoi. thi van hac ((tuc va) OR (thuc va)) hanh vi ((va triet) or (cuu tre))*.