Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
vu nang » vuc nang, va nang, vu dang
truc va » thuc va, thuc vat, trung va
di cua » dai cua, doi cua, de cua
ve tai » te tai, de tai, le tai
v nang » va nang, van nang, voi nang
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: tu sach ((v nang) or (vu nang)) xa hoi. hieu ((ve tai) or (va cac)) truc va hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((v nang) OR (vu nang)) xa hoi. hieu ((ve tai) OR (va cac)) truc va hanh di cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ((v nang) or (vu nang)) xa hoi. hieu ((ve tai) or (va cac)) truc va hanh di cua te*.