Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nhan luc » nang luc
dua tren » dung tren
phan lap » phan dau
ban phan » ban phap, van phan, ban than
luc ban » duc ban, cuc ban, luc bat
hieu ve » hieu va, hieu van
ve nhan » ve nha, de nhan, va nhan
tao hoi » tao khoi, tao boi, tay hoi
ty hang » ly hang, ty xang, thi hang
ty sang » ty xang, duy sang, thu sang
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: toc sach ((ty sang) or (ty hang)) tao hoi. hieu ve nhan luc ban phan lap ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ty sang) OR (ty hang)) tao hoi. hieu ve nhan luc ban phan lap ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: toc sach ((ty sang) or (ty hang)) tao hoi. hieu ve nhan luc ban phan lap ((dua tren) or (cua te))*.