Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
than cua » nhan cua, thai cua, ban cua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
sang xa » song xa, lang xa, sang ma
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, xuc ban
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: tu sach ky sang xa hoi. hieu va cam xuc van hanh ((than cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang xa hoi. hieu va cam xuc van hanh ((than cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang xa hoi. hieu va cam xuc van hanh ((than cua) or (dai cua)) tre*.