Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
quoc ban » quoc bao, quoc lan, quoc quan
te sach » toc sach
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang ho » nang hoc, nang co, tang ho
su sach » so sach, vu sach
ho hai » hoc hai, pho hai, cho hai
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: ((te sach) or (su sach)) ky nang ho hai. hieu ve cac ((quoc ban) or (duc van)) hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (su sach)) ky nang ho hai. hieu ve cac ((quoc ban) OR (duc van)) hanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (su sach)) ky nang ho hai. hieu ve cac ((quoc ban) or (duc van)) hanh thai cua tre*.