Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
xuc van » duc van, luc van, xuc ban
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
va cuu » va cau, va chu
va huu » vu huu
va cam » va cham, va cac, va cao

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 (thu sach)) ky nang xa hoi. hieu va cam xuc van hanh ((va cuu) or (va huu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) ky nang xa hoi. hieu va cam xuc van hanh ((va cuu) OR (va huu)) tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) ky nang xa hoi. hieu va cam xuc van hanh ((va cuu) or (va huu)) tre*.