Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chat » cao chat
thu sach » thuat sach, thuoc sach, thu hoach
chat xuc » chat huu, cam xuc, chao xu
dinh ve » dinh van
tu sach » su sach, te sach, tu cach
nang ma » tang ma, sang ma, nang cao
luu tre » luu tru, cuu tre, luy tre
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va
y nang » ky nang, ly nang, v nang

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) OR (thu sach)) y nang ma hoi. hieu van chat xuc va ((dinh ve) or (dinh ket)) luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang ma hoi. hieu van chat xuc va ((dinh ve) OR (dinh ket)) luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) y nang ma hoi. hieu van chat xuc va ((dinh ve) or (dinh ket)) luu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) y nang ma hoi. hieu van chat xuc va ((dinh ve) or (dinh ket)) luu tre*.