Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
cham sac » cham soc, pham sach, cap sac
van hanh » van thanh, ban hanh, van anh
dong cua » dung cua, cong cua, huong cua
sach ty » sach y, sach tu, xach tay
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sac van » cac van, san van, sat van

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 ty) or (sach thu)) nang xa hoi. hieu va cham sac van hanh ((dai cua) or (dong cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) nang xa hoi. hieu va cham sac van hanh ((dai cua) OR (dong cua)) triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thu)) nang xa hoi. hieu va cham sac van hanh ((dai cua) or (dong cua)) triet*.