Perhaps you should try some spelling variations:
nang hoa » nang hoat, hang hoa, nang hoc
tham loc » tham nuoc, cham soc, hau loc
hoa hoi » khoa hoi, hoa hoc, hoa doi
hieu va » lieu va
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, te cao, de cac
ve cac » va cac, vien cac
loc va » hoc va, luc va
vi cua » vai cua, di 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 (ve cac)) ky nang hoa hoi. ((hieu va) OR (hieu qua)) tham loc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cac) OR (ve cac)) ky nang hoa hoi. ((hieu va) OR (hieu qua)) tham loc va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te cac) or (ve cac)) ky nang hoa hoi. ((hieu va) OR (hieu qua)) tham loc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te cac) or (ve cac)) ky nang hoa hoi. ((hieu va) OR (hieu qua)) tham loc va hanh vi cua tre*.