Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
va hanh » va thanh, va danh, ban hanh
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
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 sach tru nang xa hoi. hieu ve cam duc ((va hanh) or (van hanh)) lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tru nang xa hoi. hieu ve cam duc ((va hanh) OR (van hanh)) lai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach tru nang xa hoi. hieu ve cam duc ((va hanh) or (van hanh)) lai cua tre*.