Perhaps you should try some spelling variations:
sach kem » hanh kem
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cham tu » pham tu, cam tu, chai tu
va hanh » van hanh, va thanh, va danh
ca tren » cau tren, cu tren, la tren
sac ky » cac ky, sai ky
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: te ((sach kem) or (sac ky)) nang xa hoi. hieu ve cham tu va hanh vi ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach kem) OR (sac ky)) nang xa hoi. hieu ve cham tu va hanh vi ca tren.
• Adding a wildcard symbol may retrieve word variants: te ((sach kem) or (sac ky)) nang xa hoi. hieu ve cham tu va hanh vi ca tren*.