Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
ky lang » ky nang, ky tang, tay lang
lai cua » dai cua, hai cua, lai chau
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
cac loc » cac lop, cac toc, cac hoc
ve cac » va cac, vien cac
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: tu sach ((ky lang) or (ky dang)) xa hoi. hieu ve cac loc ((va thanh) or (van thanh)) lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky dang)) xa hoi. hieu ve cac loc ((va thanh) OR (van thanh)) lai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) or (ky dang)) xa hoi. hieu ve cac loc ((va thanh) or (van thanh)) lai cua te*.