Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thi hanh » thi thanh
dinh thi » dinh tri
toc sach » hoc sach, doc sach, nuoc sach
hanh lam » thanh lap, hanh kem, hanh va
thi duc » thi cuc, thi dua, thi du
va dinh » van dinh, va kinh, va tinh
lam xuc » cam xuc, lam duoc
lang xa » lang ha, dang xay, lang van
tu lang » cu lang, tu lanh, xu lang
tu sach » thu sach, su sach, te sach
duc tre » duoc tren, duc tien
xuc va » duc va, tuc va, luc va

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) or (((tu sach) or (toc sach)))) tu lang xa hoi. thi hanh lam xuc va dinh thi duc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (((tu sach) OR (toc sach)))) tu lang xa hoi. thi hanh lam xuc va dinh thi duc tre.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (((tu sach) or (toc sach)))) tu lang xa hoi. thi hanh lam xuc va dinh thi duc tre*.