Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, cham soc
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
vu nang » vuc nang, va nang, vu dang
va cham » va chat, va tham
gi de » gia de, ga de, gi ve
gi he » gi ve, vi he

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (toc sach)) vu nang xa hoi. hieu va cham xuc van hanh ((gi de) OR (gi he)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) vu nang xa hoi. hieu va cham xuc van hanh ((gi de) OR (gi he)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (toc sach)) vu nang xa hoi. hieu va cham xuc van hanh ((gi de) OR (gi he)) triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) vu nang xa hoi. hieu va cham xuc van hanh ((gi de) OR (gi he)) triet*.