Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ve cam » ve cham, va cam, ve cau
ve cai » va cai, ve tai, ve cau
ve cac » va cac, vien cac
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: tu sach y nang xa hoi. hieu ((((ve cam) or (ve cai))) or (ve cac)) thuc dan hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ((((ve cam) OR (ve cai))) OR (ve cac)) thuc dan hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ((((ve cam) or (ve cai))) or (ve cac)) thuc dan hanh vi cua tre*.