Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh ve » hanh ve, thanh va, thanh vien
te sach » toc sach
hieu va » lieu va, hieu qua
soc ban » hoc ban, coc ban, so ban
hieu ve » hieu van
sach ty » sach y, sach tu, sach thu
hieu vu » hieu su, dieu vu, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
ve cua » le cua, de cua, te cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang xa hoi. ((hieu vu) or (((hieu ve) OR (hieu va)))) cham soc ban thanh ve cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. ((hieu vu) OR (((hieu ve) OR (hieu va)))) cham soc ban thanh ve cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. ((hieu vu) or (((hieu ve) OR (hieu va)))) cham soc ban thanh ve cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. ((hieu vu) or (((hieu ve) OR (hieu va)))) cham soc ban thanh ve cua tu*.