Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hang tai » hang va, dung tai
han tai » nhan tai, van tai, toan tai
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va
va cam » va cham, va cao, va cai
cua tu » cua tuc, cua su, cua cu

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 y nang xa hoi. hieu ((va cam) OR (va cac)) xuc va ((han tai) or (hang tai)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang xa hoi. hieu ((va cam) OR (va cac)) xuc va ((han tai) OR (hang tai)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang xa hoi. hieu ((va cam) OR (va cac)) xuc va ((han tai) or (hang tai)) cua tu".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. hieu ((va cam) OR (va cac)) xuc va ((han tai) or (hang tai)) cua tu*.