Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
ban hang » ngan hang
tu sach » thu sach, su sach, tu cach
te sach » toc sach
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
va cham » va chat, va tham
tuc ban » thuc ban, truc ban, tu ban
hang do » hang doi, dang do, hang di
do hoa » dong hoa

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 (te sach))) or (thu hoach)) ky nang cao hoi. hieu va cham tuc ban hang do hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (te sach))) OR (thu hoach)) ky nang cao hoi. hieu va cham tuc ban hang do hoa viet.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (te sach))) or (thu hoach)) ky nang cao hoi. hieu va cham tuc ban hang do hoa viet*.