Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
cao tren » ca tren, cau tren, co tren
thai cao » tai cao, thoai cac, thuat cao
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
xuc van » duc van, luc van, vuc van
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, te sach
vu sach » vu bach, su sach, vu khach
o hoi » co hoi, o hoc, o hoa
o hai » co hai, so hai, o lai

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 (vu sach)) ky nang ((o hoi) or (o hai)). hieu ve chat xuc van hanh thai cao tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu sach)) ky nang ((o hoi) OR (o hai)). hieu ve chat xuc van hanh thai cao tren.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu sach)) ky nang ((o hoi) or (o hai)). hieu ve chat xuc van hanh thai cao tren*.