Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
ky sang » ky nang, ky tang, duy sang
ky dang » ky nang, ky danh
van cau » van dau, van hau, van chat
cau duc » cao duc, cau luc, chu duc
dan lai » dan loai, dan lap, dan lat
lai cua » dai cua, hai cua, lai chau
va dan » ca dan, va dao, va dau
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 ((ky sang) or (ky dang)) xa hoi. hieu van cau duc va dan lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky sang) OR (ky dang)) xa hoi. hieu van cau duc va dan lai cua te.
• Adding a wildcard symbol may retrieve word variants: te sach ((ky sang) or (ky dang)) xa hoi. hieu van cau duc va dan lai cua te*.