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
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
cua tuc » cua duc, cua tu, cua thuoc
ma hoi » mai hoi, xa hoi, ma hoa

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