Perhaps you should try some spelling variations:
sang tai » hang tai, sang tao, tang tai
sang mai » sang ma, lang mai, hoang mai
van hanh » van thanh, ban hanh, van anh
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
ve cac » va cac, vien cac
vi cau » va cau, ve cau, di cau

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 ky ((sang mai) or (sang tai)) hoi. hieu ve cac xuc van hanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((sang mai) OR (sang tai)) hoi. hieu ve cac xuc van hanh vi cau tren.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((sang mai) or (sang tai)) hoi. hieu ve cac xuc van hanh vi cau tren*.