Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ban hang » ngan hang
hoc cac » hoc cao
va tham » van tham, va cham, va thanh
hang di » hang doi, hang vi, hang dien
luc ban » duc ban, cuc ban, luc bat
cu tren » tu tren, dua tren
nang xa » nang x, lang xa, nang ma
ve cam » ve cham, ve cac, va cam
di cu » di cau, di cua, di du

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

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