Perhaps you should try some spelling variations:
tang mai » tang ma, tang tai, lang mai
hieu van » hieu va, thien van, lieu va
hanh vii » hanh voi, hanh va, hanh noi
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
mai hoi » mai khoi, dai hoi, lai hoi
van hau » van ha, van hai, van dau
hau xuc » chat xuc
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: tu sach ky tang mai hoi. hieu van hau xuc va ((hanh vii) or (hanh vi)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang mai hoi. hieu van hau xuc va ((hanh vii) OR (hanh vi)) cau tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang mai hoi. hieu van hau xuc va ((hanh vii) or (hanh vi)) cau tren*.