Perhaps you should try some spelling variations:
thien van » thi van
vu khach » vu khanh, vu khac, vay khach
va triet » va thiet, va trien, ve triet
vu sach » vu bach, su sach
cau tuc » cau truc, cau tu, cau luc
va hanh » van hanh, va thanh, va danh
van cau » van dau, van hau, van chat
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
tuc va » thuc va, truc va, tuc xa
y nang » ky nang, ly nang, v nang

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