Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hanh tue » hanh tu, hanh tuyen, hanh theo
nang mai » nang ma, nang tai, lang mai
ban hanh » ban hang
tu sach » su sach, te sach, tu cach
vu cham » va cham, vu kham, tu cham
tue cua » te cua
xuc ban » duc ban, cuc ban, quoc ban
ve cham » va cham, ve chat, ve chim
mai hoi » mai khoi, dai hoi, lai hoi
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: ((tu sach) or (thu sach)) ky nang mai hoi. hieu ((ve cham) OR (vu cham)) xuc ban hanh tue cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang mai hoi. hieu ((ve cham) OR (vu cham)) xuc ban hanh tue cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang mai hoi. hieu ((ve cham) OR (vu cham)) xuc ban hanh tue cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang mai hoi. hieu ((ve cham) OR (vu cham)) xuc ban hanh tue cua te*.