Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
nang tai » hang tai, tang tai, sang tai
su sach » so sach
va cham » va chat, va tham
tai cua » thai cua, tai cuc, tri cua
va hanh » va thanh, va danh, ban hanh
hieu va » lieu va, hieu qua
tai roi » lai roi, tai hoi, tai loi
vu sach » vu bach, vu khach
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) OR (vu sach)) ky nang tai roi. hieu va cham soc ((va hanh) or (van hanh)) tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang tai roi. hieu va cham soc ((va hanh) OR (van hanh)) tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky nang tai roi. hieu va cham soc ((va hanh) or (van hanh)) tai cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ky nang tai roi. hieu va cham soc ((va hanh) or (van hanh)) tai cua te*.