Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
hanh tai » hang tai, han tai, hinh tai
thu sac » thu sach, thu san, thu xac
cham lo » cham o, cam lo, cham soc
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cao hoc » co hoc, cho hoc, chat hoc
cao hoi » cau hoi, co hoi, tao hoi
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
lo va » lo van, lao va, ly va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky nang ((cao hoi) or (cao hoc)). hieu ve cham lo va ((hanh tai) OR (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang ((cao hoi) OR (cao hoc)). hieu ve cham lo va ((hanh tai) OR (thanh tai)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sac ky nang ((cao hoi) or (cao hoc)). hieu ve cham lo va ((hanh tai) OR (thanh tai)) cua tre*".