Perhaps you should try some spelling variations:
quan tai » quan tri, quang tri, quan li
van quan » van ban
tay lang » tai lang, tay tang, tay quang
tu sach » thu sach, su sach, te sach
tai cuu » tai cuc, tai buu, tai cua
duc van » duc va, duc tan, duc manh
ty lang » ty xang, ty hang, tu lang
cuu tre » cua tre, cau tren, cau treo
va nay » va ngay, va cay

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 ((ty lang) or (tay lang)) xa hoi. hieu ((va nay) or (van nam)) duc van quan tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty lang) OR (tay lang)) xa hoi. hieu ((va nay) OR (van nam)) duc van quan tai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty lang) or (tay lang)) xa hoi. hieu ((va nay) or (van nam)) duc van quan tai cuu tre*.