Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
van chat » cao chat
bai cua » ban cua, bai ca, hai cua
xuc van » duc van, luc van, vuc van
tu sach » thu sach, te sach, tu cach
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
ma hoi » mai hoi, xa hoi, ma hoa

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 (su sach)) ty nang ma hoi. hieu van chat xuc van hanh ((bai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang ma hoi. hieu van chat xuc van hanh ((bai cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ty nang ma hoi. hieu van chat xuc van hanh ((bai cua) or (dai cua)) tre*.