Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh hai » thanh hai, nhanh hai, hang hai
cua viet » ca viet, hoa viet, cua vat
nang ma » tang ma, sang ma, nang cao
va cham » va chat, va tham
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
soc va » hoc va, loc va, doc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang ma hoi. lieu va cham soc va ((hanh hai) or (thanh san)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ma hoi. lieu va cham soc va ((hanh hai) OR (thanh san)) cua viet.
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ma hoi. lieu va cham soc va ((hanh hai) or (thanh san)) cua viet*.