Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
phan lap » phan dau
phan tap » han tap, pha tap, phan tu
truc van » truc va, thuc van, truc ban
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
vu cham » va cham, tu cham, qua cham
nang ho » nang hoc, nang co, tang ho
ty nang » ky nang, ty xang, ty hang
vu kham » vu khanh
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: tu sach ty nang ho hoi. hieu ((vu cham) OR (vu kham)) truc van ((phan tap) or (phan lap)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ho hoi. hieu ((vu cham) OR (vu kham)) truc van ((phan tap) OR (phan lap)) va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ho hoi. hieu ((vu cham) OR (vu kham)) truc van ((phan tap) or (phan lap)) va triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ho hoi. hieu ((vu cham) OR (vu kham)) truc van ((phan tap) or (phan lap)) va triet*.