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
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang

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)) y nang xa hoi. ((hieu ve) or (hieu va)) cau truc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (thuat lanh)) y nang xa hoi. ((hieu ve) OR (hieu va)) cau truc va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) OR (thuat lanh)) y nang xa hoi. ((hieu ve) or (hieu va)) cau truc va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) OR (thuat lanh)) y nang xa hoi. ((hieu ve) or (hieu va)) cau truc va hanh vai cua tre*.