Perhaps you should try some spelling variations:
thien van » thi van
dang mau » dong mau, dang van, dang su
hieu van » hieu va, lieu va, hieu ve
nang tai » hang tai, tang tai, sang tai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
mau hoi » cau hoi, mai hoi, mau ho
cam luc » cam xuc, cau luc
va nang » van nang, da nang, cam nang
tai duc » tai cuc, mai duc, tai du
duc tre » duoc tren, duc tien
luc va » duc va, tuc va, loc 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 ky dang mau hoi. ((hieu van) or (thien van)) cam luc va nang tai duc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang mau hoi. ((hieu van) OR (thien van)) cam luc va nang tai duc tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky dang mau hoi. ((hieu van) or (thien van)) cam luc va nang tai duc tre*.