Perhaps you should try some spelling variations:
ky trong » ly trong, ke trong, cay trong
nam thuc » nam thuoc, am thuc, nam thu
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
ky long » ky cong, sy long, khi long
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va, hieu van
di cua » dai cua, doi cua, de cua
tu sac » tu sach, tu cac, tu san
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ((ky long) OR (ky trong)) xa hoi. hieu ve nam thuc dan hanh ((di cua) or (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky long) OR (ky trong)) xa hoi. hieu ve nam thuc dan hanh ((di cua) OR (vai cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky long) OR (ky trong)) xa hoi. hieu ve nam thuc dan hanh ((di cua) or (vai cua)) triet*".