Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hang di » hang doi, hang vi, hang dien
va hang » van hang, va nang, va lang
kv nang » ky nang, ki nang, ke nang
di cua » dai cua, doi cua, de cua
luc va » duc va, tuc va, loc va
ve cam » ve cham, ve cac, va cam
v nang » va nang, vu nang, van nang
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: thuat sach ((v nang) or (kv nang)) xa hoi. hieu ((ve cam) or (va cac)) luc va hang di cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((v nang) OR (kv nang)) xa hoi. hieu ((ve cam) OR (va cac)) luc va hang di cua su.
• Adding a wildcard symbol may retrieve word variants: thuat sach ((v nang) or (kv nang)) xa hoi. hieu ((ve cam) or (va cac)) luc va hang di cua su*.