Perhaps you should try some spelling variations:
thuat sach » thuat lanh
thuat san » thuat toan, thuat song, thuat lanh
ve triet » va trien, su triet
nang ho » nang hoc, nang co, tang ho
cac duc » cac du, cao duc, cac dac
hanh de » hanh ve, hanh kem
hang di » hang doi, hang vi, hang dien
hieu va » lieu va, hieu qua
ho hoi » hoc hoi, hoa hoi, hoi hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) OR (thuat san)) ky nang ho hoi. hieu va cac duc va ((hanh de) or (hang di)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (thuat san)) ky nang ho hoi. hieu va cac duc va ((hanh de) OR (hang di)) ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) OR (thuat san)) ky nang ho hoi. hieu va cac duc va ((hanh de) or (hang di)) ve triet*".