Perhaps you should try some spelling variations:
tuan hanh » tuan anh, quan hanh, toan hanh
truc tuan » truc quan, truc tuyen, trung tuan
thu sach » tu sach, thuat sach, thuoc sach
dao truc » dao tuc, dao tru, dai truc
tay lang » tai lang, tay tang, tay quang
ty lang » ty xang, ty hang, tu lang
va chua » vua chua, ca chua, va chu
qua dao » lua dao, qua da, cua dao
va cua » via cua, ca cua, ma cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ty lang) or (tay lang)) xa hoi. hieu qua dao truc tuan hanh ((va cua) or (va chua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty lang) OR (tay lang)) xa hoi. hieu qua dao truc tuan hanh ((va cua) OR (va chua)) tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty lang) or (tay lang)) xa hoi. hieu qua dao truc tuan hanh ((va cua) or (va chua)) tre*.