Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nam thuc » nam thuoc, nam thu, nam tu
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
hiem he » hiem xe, hieu he, thien he
sach ky » sac ky, sach y, sach ty
danh tu » doanh thu
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
anh tu » anh tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky tang ma hoi. hiem he ((nam thuc) or (am thuc)) xa ((danh tu) OR (anh tu)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky tang ma hoi. hiem he ((nam thuc) OR (am thuc)) xa ((danh tu) OR (anh tu)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky tang ma hoi. hiem he ((nam thuc) or (am thuc)) xa ((danh tu) OR (anh tu)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky tang ma hoi. hiem he ((nam thuc) or (am thuc)) xa ((danh tu) OR (anh tu)) cua tre*.