Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
su triet » su viet, su tien, ve triet
nang ho » nang hoc, nang co, tang ho
van cam » van nam, van cau, van dam
hanh de » hanh ve, hanh kem
hang di » hang doi, hang vi, hang dien
van lam » van nam
ho hoi » hoc hoi, hoa hoi, hoi hoi
san ky » sang ky, van ky, dan ky

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 nang ho hoi. hieu ((van cam) OR (van lam)) duc va ((hanh de) or (hang di)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat san ky nang ho hoi. hieu ((van cam) OR (van lam)) duc va ((hanh de) OR (hang di)) su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat san ky nang ho hoi. hieu ((van cam) OR (van lam)) duc va ((hanh de) or (hang di)) su triet*".