Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
truc va » thuc va, thuc vat, trung va
hieu ve » hieu va, hieu van
vu nang » vuc nang, va nang, vu dang
v nang » va nang, van nang, voi nang
vi cua » vai cua, di cua
cua te » cua tu

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 ((v nang) OR (vu nang)) xa hoi. ((hieu ve) or (hieu qua)) cau truc va thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((v nang) OR (vu nang)) xa hoi. ((hieu ve) OR (hieu qua)) cau truc va thanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((v nang) OR (vu nang)) xa hoi. ((hieu ve) or (hieu qua)) cau truc va thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((v nang) OR (vu nang)) xa hoi. ((hieu ve) or (hieu qua)) cau truc va thanh vi cua te*.