Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, cach thuc
sach tham » sach nha
ban hang » ngan hang
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
va cham » va chat, va tham
ang xa » lang xa, mang xa, dang xay
vi cua » vai cua, di cua
cua te » cua tu

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 thue) OR (sach tham)) ang xa hoi. hieu va cham soc ((van hanh) or (ban hang)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach thue) OR (sach tham)) ang xa hoi. hieu va cham soc ((van hanh) OR (ban hang)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach thue) OR (sach tham)) ang xa hoi. hieu va cham soc ((van hanh) or (ban hang)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sach thue) OR (sach tham)) ang xa hoi. hieu va cham soc ((van hanh) or (ban hang)) vi cua te*.