Perhaps you should try some spelling variations:
thuc cach » thuoc sach, truoc cach, thuc hanh
phan kien » van kien
kien cua » khien cua, dien cua, tien cua
thu dac » thu duc, thu xac, thu da
va phan » van phan, va phat, va phap
cao suc » cao su, cao duc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
thu san » thuy san, thu ban, phu san
ve cao » va cao, ve bao, ve cac
suc va » duc va, tuc va, luc va
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 dac) or (thuc cach))) or (thu san)) ky lang xa hoi. hieu ve cao suc va phan kien cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((thu dac) OR (thuc cach))) OR (thu san)) ky lang xa hoi. hieu ve cao suc va phan kien cua te.
• Adding a wildcard symbol may retrieve word variants: ((((thu dac) or (thuc cach))) or (thu san)) ky lang xa hoi. hieu ve cao suc va phan kien cua te*.