Perhaps you should try some spelling variations:
tham loc » tham nuoc, cham soc, hau loc
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » hieu qua
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
te cac » ve cac, te cao, de cac
loc va » hoc va, luc va
di cua » dai cua, doi cua, de cua

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) or (tu cac)) ky lang xa hoi. ((hieu va) OR (lieu va)) tham loc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cac) OR (tu cac)) ky lang xa hoi. ((hieu va) OR (lieu va)) tham loc va hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te cac) or (tu cac)) ky lang xa hoi. ((hieu va) OR (lieu va)) tham loc va hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te cac) or (tu cac)) ky lang xa hoi. ((hieu va) OR (lieu va)) tham loc va hanh di cua tre*.