Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
dua tren » dung tren
chat xuc » chat huu, cam xuc, chat cua
lang van » dang van, tang van, hoang van
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
van hoi » van hoa, van hoc, van hoe
ky lang » ky nang, ky dang, ky tang
hieu ve » hieu va, hieu van
vi dua » vi du, vi dum, vi lua

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 lang van hoi. hieu ve ((chat xuc) or (chao xu)) va hanh vi dua tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky lang van hoi. hieu ve ((chat xuc) OR (chao xu)) va hanh vi dua tren.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky lang van hoi. hieu ve ((chat xuc) or (chao xu)) va hanh vi dua tren*.