Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
cham luc » cham soc, nhan luc, cham cuu
cua tre » cua te, cuu tre, cua triet
minh di » minh ai, minh de, minh duc
luc van » luoc van, luu van, duc van
sach ty » sach y, sach thu, xach tay
hieu ve » hieu va, hieu van
sach tu » sach thu, cach tu, sach uu
ve cham » va cham, ve chat, vu cham
x hoi » xa hoi, o hoi, x ho

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) or (sach tu)) nang x hoi. hieu ve cham luc van minh di ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) nang x hoi. hieu ve cham luc van minh di ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach tu)) nang x hoi. hieu ve cham luc van minh di ((cua tre) or (cau tren))*.