Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
su sach » vu sach
so sach » so sanh, bo sach, co sach
hieu va » hieu qua
va hanh » van hanh, va thanh, va danh
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo
cam tu » cam thu, nam tu, dam tu

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