Perhaps you should try some spelling variations:
duc tien » duc thien, luc tieng, thuc tien
nang tai » hang tai, tang tai, sang tai
cac xuc » cam xuc, cac nuoc, chat xuc
duc tre » duoc tren
va nang » van nang, da nang, cam nang
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
mau hoa » cau hoa, ma hoa, mai hoa
ky dang » ky danh
xuc va » duc va, tuc va, luc va
ve cac » va cac, vien cac

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 dang) or (ky nang)) mau hoa. hieu ve cac xuc va nang tai ((duc tre) or (duc tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky dang) OR (ky nang)) mau hoa. hieu ve cac xuc va nang tai ((duc tre) OR (duc tien)).
• Adding a wildcard symbol may retrieve word variants: su sach ((ky dang) or (ky nang)) mau hoa. hieu ve cac xuc va nang tai ((duc tre) or (duc tien))*.