Perhaps you should try some spelling variations:
van khanh » van thanh, van anh, van phan
vinh cua » sinh cua, tinh cua, dinh cua
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, te sach, tu cach
cua tre » cua te, cuu tre, cua triet
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) y nang xa hoi. hieu ve cac xuc ((van khanh) or (van hanh)) vinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) y nang xa hoi. hieu ve cac xuc ((van khanh) OR (van hanh)) vinh cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) y nang xa hoi. hieu ve cac xuc ((van khanh) or (van hanh)) vinh cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) y nang xa hoi. hieu ve cac xuc ((van khanh) or (van hanh)) vinh cua tre*.