Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thue van » thue va, thuc van, thuy van
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
hang xa » hoang xa, hang va, hang ca
hieu va » lieu va
ca thue » ca thu, ca hue, cuc thue
vai cua » dai cua, hai cua, lai cua
y hang » ly hang, ty hang, yu hang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y hang xa hoi. ((hieu va) or (hieu qua)) ca thue van hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y hang xa hoi. ((hieu va) OR (hieu qua)) ca thue van hanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: toc sach y hang xa hoi. ((hieu va) or (hieu qua)) ca thue van hanh vai cua te*.