Perhaps you should try some spelling variations:
nhan dang » nhan dan, phan dang, tran dang
luc nhan » luc nhat, cu nhan, tue nhan
tu sach » thu sach, su sach, te sach
dang vi » dung vi, dang va, hang vi
ve cham » va cham, ve chat, vu cham
sach ty » sach y, sach tu, sach thu
ca tren » cau tren, cu tren, la tren
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
ve cam » ve cac, va cam, ve cai
vi ca » vit ca, li ca, va ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((nang xa) or (nang ma)) hoi. hieu ((ve cam) or (ve cham)) luc nhan dang vi ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (nang ma)) hoi. hieu ((ve cam) OR (ve cham)) luc nhan dang vi ca tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (nang ma)) hoi. hieu ((ve cam) or (ve cham)) luc nhan dang vi ca tren*.