Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
sach loai » sach bai, cac loai, sach doi
loai nang » loai nam, luan nang, loai san
thanh tai » thanh hai, thanh toan, doanh tai
va thanh » gia thanh, ban thanh, va tinh
cuc tre » duc tre, cua tre, cuu tre
ve cau » ke cau, va cau, le cau
ve cac » va cac, vien cac
x hoi » o hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach loai nang ((x hoi) OR (xa hoi)). hieu ((ve cau) or (ve cac)) duc va thanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach loai nang ((x hoi) OR (xa hoi)). hieu ((ve cau) OR (ve cac)) duc va thanh tai cuc tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach loai nang ((x hoi) OR (xa hoi)). hieu ((ve cau) or (ve cac)) duc va thanh tai cuc tre*".