Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
dau tieng » dau tien, cau tieng, day tieng
van hanh » van thanh, ban hanh, van anh
hanh dem » hanh kem, hanh de, thanh dam
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
tuc van » thuc van, truc van, tuc va
va cau » van cau, va dau, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ty nang xa hoi. lieu ((va cau) or (va cac)) tuc van hanh dem dau tieng~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty nang xa hoi. lieu ((va cau) OR (va cac)) tuc van hanh dem dau tieng.
• Adding a wildcard symbol may retrieve word variants: thuat sach ty nang xa hoi. lieu ((va cau) or (va cac)) tuc van hanh dem dau tieng*.