Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thuat lanh » thuat lap, thuat san
thanh vi » hanh vi, thanh va, thanh ve
dau tren » dau tien, dat tren, dau tieng
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va
loc va » hoc va
vi dau » vi dai, va dau, bi dau

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 ((luc va) OR (loc va)) thanh vi dau 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 ((luc va) OR (loc va)) thanh vi dau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (thuat lanh)) ky nang xa hoi. hieu ve cam ((luc va) OR (loc va)) thanh vi dau tren".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (thuat lanh)) ky nang xa hoi. hieu ve cam ((luc va) OR (loc va)) thanh vi dau tren*.