Perhaps you should try some spelling variations:
hieu tieng » viet tieng, dien tieng, tiep tieng
bieu hien » dieu hien, dieu khien, bien phien
cua triet » cua viet, su triet, va triet
cac thuc » cach thuc, cac thu, can thuc
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
hanh dao » lanh dao, thanh dat, thanh dam
thu san » thuy san, thu ban, phu san
dao cua » dai cua, day cua, dan cua
tu san » tu ban, tu can, vu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu san) OR (thu san)) ky nang x ho. ((hieu tieng) or (bieu hien)) cac thuc van hanh dao cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (thu san)) ky nang x ho. ((hieu tieng) OR (bieu hien)) cac thuc van hanh dao cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu san) OR (thu san)) ky nang x ho. ((hieu tieng) or (bieu hien)) cac thuc van hanh dao cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu san) OR (thu san)) ky nang x ho. ((hieu tieng) or (bieu hien)) cac thuc van hanh dao cua triet*.