Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
tham hoc » thai hoc, tham hoa, than hoc
dan hanh » dang hanh, dan khanh, dan thanh
cau tren » cu tren, dau tren, ca tren
tu sach » te sach, tu cach, vu sach
su sach » so sach, vu sach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
vi cau » va cau, ve cau, di cau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (((tu sach) OR (su sach)))) ty nang xa hoi. hieu va tham hoc dan hanh vi cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (((tu sach) OR (su sach)))) ty nang xa hoi. hieu va tham hoc dan hanh vi cau tren~".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (((tu sach) OR (su sach)))) ty nang xa hoi. hieu va tham hoc dan hanh vi cau tren*.