Perhaps you should try some spelling variations:
tham soc » tham nuoc, thai son, tham hoa
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
lang ha » long ha
hieu va » lieu va, hieu qua
ky lang » ky nang, ky dang, ky tang
vi cua » vai cua, di cua
te cac » tu cac, ve cac, te cao
ham so » nam so
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cac ky lang ha hoi. hieu va ((((tham soc) OR (ham so))) or (cham soc)) van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky lang ha hoi. hieu va ((((tham soc) OR (ham so))) OR (cham soc)) van hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky lang ha hoi. hieu va ((((tham soc) OR (ham so))) or (cham soc)) van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te cac ky lang ha hoi. hieu va ((((tham soc) OR (ham so))) or (cham soc)) van hanh vi cua tre*.