Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
van cam » van nam, van lam, van cau
va hanh » van hanh, va thanh, va danh
cu tren » dua tren
tu tren » tu truyen, tu tieng, tu trong
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) OR (bo sach)) y nang x hoi. hieu van cam xuc va hanh vi ((cu tren) or (tu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) y nang x hoi. hieu van cam xuc va hanh vi ((cu tren) OR (tu tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (bo sach)) y nang x hoi. hieu van cam xuc va hanh vi ((cu tren) or (tu tren))".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (bo sach)) y nang x hoi. hieu van cam xuc va hanh vi ((cu tren) or (tu tren))*.