Perhaps you should try some spelling variations:
hieu hieu » hien hieu, hieu hien, thien hieu
hieu cac » hieu luc, hieu va, hieu van
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
danh vai » danh sai, danh va, doanh van
su sach » so sach, vu sach
ly nang » ky nang, ly hang, ly vang
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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 ((ly nang) or (ty xang)) xa hoi. hieu hieu cac nuoc va danh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ly nang) OR (ty xang)) xa hoi. hieu hieu cac nuoc va danh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((ly nang) or (ty xang)) xa hoi. hieu hieu cac nuoc va danh vai cua tre*.