Perhaps you should try some spelling variations:
thue nang » thien nang, thuat nang, thi nang
toc sach » doc sach, thuoc sach, nuoc sach
dai tren » dat tren, dau tren, dan tren
hoc sach » hoc sinh, hoc cac, hoc anh
nang ma » tang ma, sang ma, nang cao
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
hieu va » lieu va, hieu qua
ma hoi » mai hoi, xa hoi, ma hoa
dam tu » nam tu, cam tu, dam thuc
tam tu » nam tu, cam tu, tam thuc
vi dai » si dai, li dai, vien dai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) thue nang ma hoi. hieu va ((dam tu) OR (tam tu)) va tinh vi dai tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) thue nang ma hoi. hieu va ((dam tu) or (tam tu)) va tinh vi dai tren~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (hoc sach)) thue nang ma hoi. hieu va ((dam tu) or (tam tu)) va tinh vi dai tren*.