Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
ve cac » va cac, vien cac
di cua » doi cua, de cua, do cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang xa hoi. hieu ((va cam) or (ve cac)) thuc dan hanh ((di cua) OR (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ((va cam) OR (ve cac)) thuc dan hanh ((di cua) OR (dai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu ((va cam) or (ve cac)) thuc dan hanh ((di cua) OR (dai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ((va cam) or (ve cac)) thuc dan hanh ((di cua) OR (dai cua)) triet*.