Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
su sach » so sach, vu sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
ly vang » ly hang, ly van, ly quang
ly nang » ky nang, ly hang, ly quang
thu va » thuc va, thue va, tu va
vi cua » vai cua, di cua
ve cac » va cac

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 (ly vang)) xa hoi. hieu ((ve cac) OR (vien cac)) thu va danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ly nang) OR (ly vang)) xa hoi. hieu ((ve cac) OR (vien cac)) thu va danh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ly nang) or (ly vang)) xa hoi. hieu ((ve cac) OR (vien cac)) thu va danh vi cua tre*".