Perhaps you should try some spelling variations:
hang vai » hang tai, hang hai, hang vi
cao nang » cao dang, cam nang, cao tang
tu sach » thu sach, su sach, te sach
cam tuc » cam xuc, cam tu, nam thuc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
ho nang » thi nang, kha nang
tuc va » thuc va, truc va, tuc xa
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 ((ho nang) OR (cao nang)) xa hoi. hieu ve cam tuc va ((hang vai) or (hang va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ho nang) OR (cao nang)) xa hoi. hieu ve cam tuc va ((hang vai) OR (hang va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ho nang) OR (cao nang)) xa hoi. hieu ve cam tuc va ((hang vai) or (hang va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ho nang) OR (cao nang)) xa hoi. hieu ve cam tuc va ((hang vai) or (hang va)) cua tre*.