Perhaps you should try some spelling variations:
chay tren » thai tren, ca tren, cau tren
thu sach » tu sach, thuat sach, thuoc sach
lai chay » lai chau, lam chay, lai chang
hanh lai » hanh lam, hanh tai, thanh lap
tan hanh » tan thanh, tang hanh, toan hanh
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
dang xa » dang xay, dang ha, dang va
ve cam » ve cham, ve cac, va cam

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 ((dang xa) or (lang xa)) hoi. hieu ve cam duc tan hanh lai chay tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (thu sach)) ky ((dang xa) OR (lang xa)) hoi. hieu ve cam duc tan hanh lai chay tren.
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (thu sach)) ky ((dang xa) or (lang xa)) hoi. hieu ve cam duc tan hanh lai chay tren*.