Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
cham luc » cham soc, nhan luc, cham cuu
hieu ve » hieu va, hieu van
lai cua » dai cua, hai cua, lai chau
luc van » luoc van, luu van, duc van
ve cham » va cham, ve chat, vu cham
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

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 y) or (sac ky)) ((tang ma) or (nang x)) hoi. hieu ve cham luc van hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sac ky)) ((tang ma) OR (nang x)) hoi. hieu ve cham luc van hanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sac ky)) ((tang ma) or (nang x)) hoi. hieu ve cham luc van hanh lai cua tre*.