Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, su sach, tu cach
tai cuu » tai cuc, tai buu, tai cua
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, nam thuc, dam thuc
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
nang va » nang van, hang va, nang ma
te sach » toc sach
va hoi » xa hoi, va hoc, va hoa
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: ((tu sach) or (te sach)) ky nang va hoi. hieu ve ((cam tuc) OR (cam tu)) va hanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang va hoi. hieu ve ((cam tuc) OR (cam tu)) va hanh tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky nang va hoi. hieu ve ((cam tuc) OR (cam tu)) va hanh tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang va hoi. hieu ve ((cam tuc) OR (cam tu)) va hanh tai cuu tre*.