Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
cham tuc » nham thuc, pham thuc, tham thuc
su sach » so sach, vu sach
tuc van » thuc van, truc van, tuc va
nang ro » nang co, nang ra, nang rong
tai cua » thai cua, tai cuc, tri cua
nang ho » nang hoc, nang co, tang ho
nang va » nang van, hang va, nang ma
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
va cham » va chat, va tham
cua te » cua tu

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

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