Perhaps you should try some spelling variations:
toc sach » hoc sach, thuoc sach, nuoc sach
van chat » cao chat
doc sach » hoc sach, nuoc sach, dac sac
tay lang » tai lang, tay tang, tay quang
lang van » dang van, tang van, hoang van
van hanh » van thanh, ban hanh, van anh
hanh di » hanh vi, hanh de, hang di
tuc van » thuc van, truc van, tuc va
ve cham » va cham, ve chat, vu cham
van hoi » van hoa, van hoc, van hoe
di cua » dai cua, doi cua, de cua
cua su » qua su

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) or (doc sach)) tay lang van hoi. hieu ((ve cham) or (van chat)) tuc van hanh di cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) tay lang van hoi. hieu ((ve cham) OR (van chat)) tuc van hanh di cua su.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (doc sach)) tay lang van hoi. hieu ((ve cham) or (van chat)) tuc van hanh di cua su*.