Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
chat xuc » chat huu, cam xuc, chao xu
dinh vi » dinh ve, dinh viet, dinh tri
va dinh » van dinh, va kinh, va tinh
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
luy tre » luyen tre
xuc va » duc va, tuc va, luc va
vi luy » vi lua, vi luu

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 ((sang ma) or (nang ma)) hoi. ((hieu van) or (hieu va)) chat xuc va dinh vi luy tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((sang ma) OR (nang ma)) hoi. ((hieu van) OR (hieu va)) chat xuc va dinh vi luy tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((sang ma) or (nang ma)) hoi. ((hieu van) or (hieu va)) chat xuc va dinh vi luy tre*.