Perhaps you should try some spelling variations:
thieu nien » thien nhien
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » thuat sach, thu hoach, khau sach
hanh vai » hanh vi, hanh va, hanh tai
nien cau » hien cau, nien dau, khien cau
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cau luc » cau truc, cau phuc
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
luc va » duc va, tuc va, loc va
cua cu » cua chu, cua cau, cua su

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 (thu sach))) or (thuoc sach)) ky nang xa hoi. thieu nien cau luc va hanh vai cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (thu sach))) OR (thuoc sach)) ky nang xa hoi. thieu nien cau luc va hanh vai cua cu.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (thu sach))) or (thuoc sach)) ky nang xa hoi. thieu nien cau luc va hanh vai cua cu*.