Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
tang mai » tang ma, tang tai, lang mai
cham xuc » cam xuc, chat xuc, cham soc
dau tren » dau tien, dat tren, dau tieng
su sach » so sach, vu sach
sach do » sach dao, sach doi, sach de
do tang » de tang, do dang, cao tang
mai hoi » mai khoi, dai hoi, lai hoi
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
hanh va » hang va, hanh vi
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach do tang mai hoi. hieu vu cham xuc va ((thanh van) or (hanh va)) dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach do tang mai hoi. hieu vu cham xuc va ((thanh van) OR (hanh va)) dau tren.
• Adding a wildcard symbol may retrieve word variants: su sach do tang mai hoi. hieu vu cham xuc va ((thanh van) or (hanh va)) dau tren*.