Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va danh, ban hanh
ve chai » ve cai, ve chat, va chai
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
chai o » thai o, chi o, chai lao
va cuu » va cau, va chu
va huu » vu huu

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 xa hoi. hieu ve chai o ((va hanh) or (va thanh)) ((va cuu) or (va huu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu ve chai o ((va hanh) OR (va thanh)) ((va cuu) OR (va huu)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ve chai o ((va hanh) or (va thanh)) ((va cuu) or (va huu)) tre*.