Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
danh dau » lanh dao, hang dau, danh tu
hoc cac » hoc cao
dau cua » dai cua, day cua, cau cua
va cham » va chat, va tham
nang ma » tang ma, sang ma, nang cao
tien va » dien va, thien van
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, duc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc cac) or (thuoc sach)) ky nang ma hoi. tien va cham ((tuc va) or (tuc xa)) danh dau cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc cac) OR (thuoc sach)) ky nang ma hoi. tien va cham ((tuc va) OR (tuc xa)) danh dau cua tre.
• Adding a wildcard symbol may retrieve word variants: ((hoc cac) or (thuoc sach)) ky nang ma hoi. tien va cham ((tuc va) or (tuc xa)) danh dau cua tre*.