Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
va hang » van hang, va nang, va lang
hang vi » hang va, hanh vi, 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
vi cua » vai cua, di 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: thuat sach ((y nang) or (ky nang)) xa hoi. hieu ((ve cam) or (va cac)) luc va hang vi cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((y nang) OR (ky nang)) xa hoi. hieu ((ve cam) OR (va cac)) luc va hang vi cua su.
• Adding a wildcard symbol may retrieve word variants: thuat sach ((y nang) or (ky nang)) xa hoi. hieu ((ve cam) or (va cac)) luc va hang vi cua su*.