Perhaps you should try some spelling variations:
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
tinh cuc » tich cuc, tinh cua, tinh duc
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, ban hanh
y xang » ty xang
xang o » lang o, tang o, dang o
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
o hoc » co hoc, mo hoc, so hoc
thue » thu, thuc, thuy

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y xang o hoc. hieu va cam tuc va hanh tinh cuc thue~.
• Adding a wildcard symbol may retrieve word variants: tu sach y xang o hoc. hieu va cam tuc va hanh tinh cuc thue*.