Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
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
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: su sach ky 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: su sach ky nang x hoi. hieu van cam xuc va hanh vi ((cu tren) OR (tu tren)).
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu van cam xuc va hanh vi ((cu tren) or (tu tren))*.