Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
day hanh » day nhanh, day thanh, day manh
dao hanh » dao thanh, dang hanh, ban hanh
da thanh » dao thanh, dat thanh, dam thanh
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
cua tre » cua te, cuu tre, cua triet
vu cac » va cac, tu cac, ve cac
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu cac ky nang x ho. hieu ve pham thuc ((((day hanh) or (dao hanh))) or (da thanh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu cac ky nang x ho. hieu ve pham thuc ((((day hanh) OR (dao hanh))) OR (da thanh)) di cua tre.
• Adding a wildcard symbol may retrieve word variants: vu cac ky nang x ho. hieu ve pham thuc ((((day hanh) or (dao hanh))) or (da thanh)) di cua tre*.