Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
tan hanh » tan thanh, tang hanh, toan hanh
hieu va » lieu va, hieu qua
luc tan » luc tai, duc tan, luc tam
va coc » va cuoc, va cac, va hoc
vi cua » vai cua
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (thuoc sach)) ky nang x hoi. hieu va coc luc tan hanh ((vi cua) or (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ky nang x hoi. hieu va coc luc tan hanh ((vi cua) OR (di cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuoc sach)) ky nang x hoi. hieu va coc luc tan hanh ((vi cua) or (di cua)) tre*.