Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
toc sach » doc sach, thuoc sach, nuoc sach
van hanh » van thanh, ban hanh, van anh
hoc sach » hoc sinh, hoc cac, hoc anh
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
qua cac » cua cac
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
luu tre » luu tru, cuu tre, luy tre
ma hoi » mai hoi, xa hoi, ma hoa
vi luu » vi lua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((((toc sach) OR (hoc sach))) or (thuat san)) ky sang ma hoi. hieu qua cac xuc van hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((toc sach) OR (hoc sach))) OR (thuat san)) ky sang ma hoi. hieu qua cac xuc van hanh vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((toc sach) OR (hoc sach))) or (thuat san)) ky sang ma hoi. hieu qua cac xuc van hanh vi luu tre".
• Adding a wildcard symbol may retrieve word variants: ((((toc sach) OR (hoc sach))) or (thuat san)) ky sang ma hoi. hieu qua cac xuc van hanh vi luu tre*.