Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nang cau » nang cao, hang cau, nang dau
thanh vi » thanh va, thanh ve, nhanh vi
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
luu tre » luu tru, cuu tre, luy tre
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va

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 ty nang cau hoi. hieu ve cam xuc va ((thanh vi) or (hanh vi)) luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang cau hoi. hieu ve cam xuc va ((thanh vi) OR (hanh vi)) luu tre*.