Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
dua tren » dung tren
van hanh » van thanh, ban hanh, van anh
hanh va » hang va, hanh vi
xuc van » duc van, luc van, vuc van
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
mang xa » mang may, dang xay, mang cua
va cam » va cham, va cac, va cao
cua te » cua tu

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 ((mang xa) or (lang xa)) hoi. hieu va cam xuc van hanh va ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky ((mang xa) OR (lang xa)) hoi. hieu va cam xuc van hanh va ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: thuat sach ky ((mang xa) or (lang xa)) hoi. hieu va cam xuc van hanh va ((dua tren) or (cua te))*.