Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
tang van » dang van, hoang van, trong van
tu sach » su sach, te sach, tu cach
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
van hoi » van hoa, van hoc, van hoe
ky tang » ky nang, ky dang, kho tang
du tren » dua tren, dau tren, duc tren
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
vi du » vi dum, va du, ve du

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