Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tai hanh » tai thanh, tai nhanh, thi hanh
hieu van » hieu va, thien van, lieu va
hac luoc » khac cuoc, khai luoc, hai luom
luoc gia » quoc gia, luc gia, luong gia
hanh xa » hanh va, hanh ma, hanh xu
van hac » van hoc, van ha, van hai
san cua » sang cua, ban cua, dan cua
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: ((te sach) OR (toc sach)) tai hanh xa hoi. hieu van hac luoc gia thanh san cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) tai hanh xa hoi. hieu van hac luoc gia thanh san cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) tai hanh xa hoi. hieu van hac luoc gia thanh san cua te*.