Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va hang » van hang, va nang, va lang
hang de » hoang de, hanh de, hang di
y nang » ly nang, v nang, may nang
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va, loc va
de cua » le cua, te cua, dieu cua
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((y nang) or (ky nang)) xa hoi. hieu ((ve cam) or (va cac)) luc va hang de cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (ky nang)) xa hoi. hieu ((ve cam) OR (va cac)) luc va hang de cua su.
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) or (ky nang)) xa hoi. hieu ((ve cam) or (va cac)) luc va hang de cua su*.