Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nang mai » nang ma, nang tai, lang mai
dua tren » dung tren
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
mai hoi » mai khoi, dai hoi, lai hoi
va cham » va chat, va tham
cuu va » cuu ve
vi dua » vi du, vi dum, vi lua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ly nang mai hoi. lieu va cham ((cuu va) or (cuu van)) hanh vi dua tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ly nang mai hoi. lieu va cham ((cuu va) OR (cuu van)) hanh vi dua tren.
• Adding a wildcard symbol may retrieve word variants: thu sach ly nang mai hoi. lieu va cham ((cuu va) or (cuu van)) hanh vi dua tren*.