Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
ban hang » ngan hang
tu sach » thu sach, su sach, te sach
cam duc » cam xuc, cao duc, pham duc
vai cua » dai cua, hai cua, lai cua
duc ban » duc tan, duc van, dua ban
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
vi cua » di cua
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) or (thuat sach)) ky nang xa hoi. hieu ve cam duc ban hang ((vi cua) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky nang xa hoi. hieu ve cam duc ban hang ((vi cua) OR (vai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky nang xa hoi. hieu ve cam duc ban hang ((vi cua) or (vai cua)) tre*.