Perhaps you should try some spelling variations:
thien van » thi van
danh vai » danh sai, danh va, doanh van
vu sach » vu bach, su sach, vu khach
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
nang xa » lang xa, nang ma, mang xa
cua tu » cua tuc, cua su, cua cu
nuoc » quoc, duoc, ngoc

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) OR (nang x)) hoi. ((hieu ve) or (thien van)) dat nuoc va danh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty ((nang xa) OR (nang x)) hoi. ((hieu ve) OR (thien van)) dat nuoc va danh vai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty ((nang xa) OR (nang x)) hoi. ((hieu ve) or (thien van)) dat nuoc va danh vai cua tu".
• Adding a wildcard symbol may retrieve word variants: vu sach ty ((nang xa) OR (nang x)) hoi. ((hieu ve) or (thien van)) dat nuoc va danh vai cua tu*.