Perhaps you should try some spelling variations:
danh dai » danh dau, danh di, danh sai
thuc dan » thuc hanh, thuc vat
xach tay » canh tay
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((xach tay) or (sach ty)) nang ma hoi. hieu va cam ((thuc dan) or (hoc dan)) danh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((xach tay) OR (sach ty)) nang ma hoi. hieu va cam ((thuc dan) OR (hoc dan)) danh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((xach tay) or (sach ty)) nang ma hoi. hieu va cam ((thuc dan) or (hoc dan)) danh dai cua tre*.