Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
tinh dai » trinh dai, tinh da, tinh hai
va triet » va thiet, va trien, ve triet
mai hoi » mai khoi, dai hoi, lai hoi
qua dam » cua dam, qua da, dua dam
va tinh » may tinh
te cac » tu cac, ve cac, te cao
me hoi » le hoi
dam tu » nam tu, cam tu, tam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cac ky nang ((me hoi) or (mai hoi)). hieu qua dam tu va tinh dai ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky nang ((me hoi) OR (mai hoi)). hieu qua dam tu va tinh dai ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky nang ((me hoi) or (mai hoi)). hieu qua dam tu va tinh dai ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: te cac ky nang ((me hoi) or (mai hoi)). hieu qua dam tu va tinh dai ((cua triet) OR (va triet))*.