Perhaps you should try some spelling variations:
nhan tai » hang tai, van tai, toan tai
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, te sach, tu cach
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
co suc » cao suc, co su, cong suc
va co » vo co

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)) ky nang xa hoi. hieu va co suc manh ((hanh tai) or (nhan tai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang xa hoi. hieu va co suc manh ((hanh tai) OR (nhan tai)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky nang xa hoi. hieu va co suc manh ((hanh tai) or (nhan tai)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky nang xa hoi. hieu va co suc manh ((hanh tai) or (nhan tai)) cuu tre*.