Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
thu sach » thuat sach, thuoc sach, thu hoach
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, cham soc
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
hanh vu » hanh vi, hanh va, hanh tu
xuc van » duc van, luc van, vuc van
tu sach » su sach, te sach, tu cach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
vu va » vu van, tu va, su va

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 (thu sach)) ky ((nang xa) or (nang ma)) hoi. hieu van cham xuc van hanh vu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky ((nang xa) OR (nang ma)) hoi. hieu van cham xuc van hanh vu va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky ((nang xa) or (nang ma)) hoi. hieu van cham xuc van hanh vu va triet*".