Perhaps you should try some spelling variations:
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va thanh, va danh
vu sach » vu bach, su sach, vu khach
ve chao » ve chat, ve cham, ve chang
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
ve cho » ve co, ve che, de cho
xu va » xu van, tu va, su va
va va » va van, va vai, va vat

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

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