Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
vinh cua » sinh cua, tinh cua, dinh cua
van hanh » ban hanh, van anh, van ban
tu sach » thu sach, te sach, tu cach
cua tre » cua te, cuu tre, cua triet
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 nuoc ((van thanh) 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 nuoc ((van thanh) 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 nuoc ((van thanh) or (van hanh)) vinh cua tre*.