Perhaps you should try some spelling variations:
loai hoc » logic hoc, loai khoa, hoa hoc
qua chat » qua nhat, qua cham, luan chat
chat tuc » chat xuc, luat tuc, chat huu
hanh vai » hanh vi, hanh va, hanh tai
va hanh » van hanh, va thanh, va danh
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
tuc va » thuc va, truc va, tuc xa
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: tu san ky nang ((loai hoc) or (dai hoc)). hieu qua chat tuc va hanh vai ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang ((loai hoc) OR (dai hoc)). hieu qua chat tuc va hanh vai ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: tu san ky nang ((loai hoc) or (dai hoc)). hieu qua chat tuc va hanh vai ((cua te) or (cua tu))*.