Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nham thuc » nhan thuc, nam thuc, nham thu
vu khanh » vu thanh, van khanh, duy khanh
hieu sua » hieu suat, hieu qua, hieu cua
sua nham » cua nha, cua nhan, qua nhat
thuc gia » thuc giai, thue gia, thuc dia
thanh va » thanh van, hanh va, thanh ha
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu khanh) or (thuat sach)) ky nang ma hoi. hieu sua nham thuc gia thanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khanh) OR (thuat sach)) ky nang ma hoi. hieu sua nham thuc gia thanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu khanh) or (thuat sach)) ky nang ma hoi. hieu sua nham thuc gia thanh va cua tre*.