Perhaps you should try some spelling variations:
chay tren » thai tren, ca tren, cau tren
thu sach » tu sach, thuat sach, thuoc sach
cham duc » pham duc, cham soc, pham duy
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
lai chay » lai chau, lam chay, lai chang
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
duc van » duc va, duc tan, duc manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (thu sach)) ky lang xa hoi. hieu ve cham duc van hanh lai chay tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (thu sach)) ky lang xa hoi. hieu ve cham duc van hanh lai chay tren.
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (thu sach)) ky lang xa hoi. hieu ve cham duc van hanh lai chay tren*.