Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
su triet » su viet, su tien, ve triet
hieu ve » hieu va, hieu van
cau tuc » cau tu, cau luc, cau phuc
va hanh » van hanh, va thanh, va danh
san ky » sang ky, van ky, ban ky
dan ky » van ky
tai su » tai so, tai tu, lai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((san ky) OR (dan ky)) nang x ho. hieu ve ((cau tuc) or (cau truc)) va hanh tai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((san ky) OR (dan ky)) nang x ho. hieu ve ((cau tuc) OR (cau truc)) va hanh tai su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((san ky) OR (dan ky)) nang x ho. hieu ve ((cau tuc) or (cau truc)) va hanh tai su triet*".