Perhaps you should try some spelling variations:
tang mai » tang ma, lang mai, sang mai
hang tai » dung tai
tang tai » dung tai, sang tao, dong tai
cua tre » cua te, cuu tre, cua triet
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
sac kho » suc khoe, cac khoi, dac khoa
ve cam » ve cham, ve cac, va cam
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac kho ((tang mai) OR (tang tai)) khoi. hieu ve cam duc va ((hang tai) or (hang va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac kho ((tang mai) OR (tang tai)) khoi. hieu ve cam duc va ((hang tai) OR (hang va)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac kho ((tang mai) OR (tang tai)) khoi. hieu ve cam duc va ((hang tai) or (hang va)) cua tre*".