Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va cham » va chat, va tham
kinh vi » dinh vi, kinh ve, kenh vi
va kinh » va tinh, qua kinh
vu nang » vuc nang, va nang, vu dang
truc va » thuc va, thuc vat, trung va
vi cua » vai cua, di cua
va cai » va cac, va bai, va dai
v nang » va nang, van nang, voi nang
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: thu sach ((v nang) or (vu nang)) xa hoi. hieu ((va cai) or (va cham)) truc va kinh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((v nang) OR (vu nang)) xa hoi. hieu ((va cai) OR (va cham)) truc va kinh vi cua te.
• Adding a wildcard symbol may retrieve word variants: thu sach ((v nang) or (vu nang)) xa hoi. hieu ((va cai) or (va cham)) truc va kinh vi cua te*.