Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
doi thoi » doi thoai, moi thoi, do thoi
thuc dan » thuc hanh, hoc dan, thuc vat
thu sac » thu sach, thu san, thu xac
hanh ve » hanh vi, hanh va, hanh kem
hanh di » hanh vi, hanh de, hang di
ve pham » vi pham, v pham, ve phan
doi hoi » doi voi, doi moi, dai hoi
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
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: thu sac ky nang ((doi hoi) OR (doi thoi)). hieu ve pham thuc dan ((hanh di) or (hanh ve)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang ((doi hoi) OR (doi thoi)). hieu ve pham thuc dan ((hanh di) OR (hanh ve)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sac ky nang ((doi hoi) OR (doi thoi)). hieu ve pham thuc dan ((hanh di) or (hanh ve)) cua te".
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang ((doi hoi) OR (doi thoi)). hieu ve pham thuc dan ((hanh di) or (hanh ve)) cua te*.