Perhaps you should try some spelling variations:
sach kem » hanh kem
cham luc » cham soc, nhan luc, cham cuu
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va danh » va dinh, va dan, va hanh
danh ve » dinh ve, hanh ve, anh ve
su tien » su kien, su hien, tu tieng
luc va » duc va, tuc va, loc va
ve su » va su

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach kem) or (sach y)) lang xa hoi. hieu va cham luc va danh ve su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach kem) OR (sach y)) lang xa hoi. hieu va cham luc va danh ve su tien.
• Adding a wildcard symbol may retrieve word variants: su ((sach kem) or (sach y)) lang xa hoi. hieu va cham luc va danh ve su tien*.