Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
te sach » toc sach
cam tuc » cam xuc, cam tu, nam thuc
vai cua » hai cua, lai cua, bai cua
tuc van » thuc van, truc van, tuc va
hieu ve » hieu va, hieu van
tay hoi » tay ho, tao hoi, tay thai
ve cam » ve cham, ve cac, va cam
sach o » sach lo, sac o, sach y
o dang » xo dang, do dang, so dang

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 o dang ((tay hoi) or (xa hoi)). hieu ve cam tuc van thanh ((vai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach o dang ((tay hoi) OR (xa hoi)). hieu ve cam tuc van thanh ((vai cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach o dang ((tay hoi) or (xa hoi)). hieu ve cam tuc van thanh ((vai cua) or (dai cua)) tre*.