Perhaps you should try some spelling variations:
thuat sach » thuat san
thuat lanh » thuat lap, thuat san
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cham lo » cam lo, cham soc, cham hoi
hieu ve » hieu va, hieu van
cao hoi » cau hoi, co hoi, cao hoc
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
cham o » cham soc

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) OR (thuat lanh)) ty nang cao hoi. hieu ve ((cham lo) or (cham o)) va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (thuat lanh)) ty nang cao hoi. hieu ve ((cham lo) OR (cham o)) va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) OR (thuat lanh)) ty nang cao hoi. hieu ve ((cham lo) or (cham o)) va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) OR (thuat lanh)) ty nang cao hoi. hieu ve ((cham lo) or (cham o)) va hanh vai cua tre*.