Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
dua tren » dung tren
hanh lai » hanh lam, hanh tai, thanh lap
vu sach » vu bach, su sach, vu khach
hanh va » hang va, hanh vi
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach tru nang x hoi. hieu ve cam duc va ((hanh lai) or (hanh va)) ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tru nang x hoi. hieu ve cam duc va ((hanh lai) OR (hanh va)) ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: vu sach tru nang x hoi. hieu ve cam duc va ((hanh lai) or (hanh va)) ((dua tren) or (cua te))*.