Perhaps you should try some spelling variations:
thuat bach » thuat sach, thuat mach, thuat tach
khoai lang » hoa lang, hoi lang
khoa dang » khoa dung, hoa dan, hoa dong
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
may hoa » may khoa, ma hoa, day hoa
ve cam » ve cham, ve cac, va cam
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat bach ((khoa dang) or (khoai lang)) may hoa. hieu ve cam duc va danh vi ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat bach ((khoa dang) OR (khoai lang)) may hoa. hieu ve cam duc va danh vi ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: thuat bach ((khoa dang) or (khoai lang)) may hoa. hieu ve cam duc va danh vi ((cua te) or (cua tu))*.