Perhaps you should try some spelling variations:
sach chuc » cach thuc, sach che, sach thu
cham xuc » cam xuc, chat xuc, cham soc
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
xuc van » duc van, luc van, vuc van
vi su » va su, ve su, oi su
ki su » ky su

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 chuc nang xa hoi. hieu va cham xuc van hanh ((vi su) or (ki su)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach chuc nang xa hoi. hieu va cham xuc van hanh ((vi su) OR (ki su)) viet.
• Adding a wildcard symbol may retrieve word variants: tu sach chuc nang xa hoi. hieu va cham xuc van hanh ((vi su) or (ki su)) viet*.