Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thuat lanh » thuat lap, thuat san
cau tren » cu tren, dau tren, ca tren
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
vi cau » va cau, ve cau, di cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (thuat lanh)) ky nang xa hoi. hieu ve cam ((xuc va) or (tuc va)) hanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (thuat lanh)) ky nang xa hoi. hieu ve cam ((xuc va) OR (tuc va)) hanh vi cau tren.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (thuat lanh)) ky nang xa hoi. hieu ve cam ((xuc va) or (tuc va)) hanh vi cau tren*.