Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nang tai » hang tai, tang tai, sang tai
vien dai » hien dai
truc va » thuc va, thuc vat, trung va
vien da » hien dai
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
tuc va » thuc va, tuc xa, duc va
cuc te » cua te, cuc thue, cuc tieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky nang ma hoa. hieu ((vien dai) or (vien da)) ((tuc va) OR (truc va)) nang tai cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang ma hoa. hieu ((vien dai) OR (vien da)) ((tuc va) OR (truc va)) nang tai cuc te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky nang ma hoa. hieu ((vien dai) or (vien da)) ((tuc va) OR (truc va)) nang tai cuc te".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang ma hoa. hieu ((vien dai) or (vien da)) ((tuc va) OR (truc va)) nang tai cuc te*.