Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thu sach » thuat sach, thuoc sach, thu hoach
van chat » cao chat
kinh vi » dinh vi, kinh ve, kenh vi
tu sach » su sach, te sach, tu cach
ty nang » ky nang, ty xang, ty hang
luu tre » luu tru, cuu tre, luy tre
xuc va » tuc va, luc va, xac va
vi luu » vi lua
x hoi » xa hoi, o hoi, x ho

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