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