Perhaps you should try some spelling variations:
chieu thien » chieu chien, hieu hien
thien hach » thien thanh, hien hanh
huu them » huu thu, huu thuc, huu liem
hach xuc » thach duc, hanh xu, cach xu
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
huu tre » huu tri, cuu tre, huu tien
tu sach » thu sach, su sach, te sach
ma hoi » mai hoi, xa hoi, ma hoa
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 ty nang ma hoi. chieu thien hach xuc va hanh va ((huu tre) or (huu them))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ma hoi. chieu thien hach xuc va hanh va ((huu tre) OR (huu them)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ma hoi. chieu thien hach xuc va hanh va ((huu tre) or (huu them))*.