Perhaps you should try some spelling variations:
cao truc » cau truc, vao truc, cao thuoc
vien cua » viec cua, dien cua, tien cua
thu sac » thu sach, thu san, thu xac
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
va nhan » van nhan, ca nhan, va phan
sac ky » cac ky, sai ky
ve cao » va cao, ve bao, ve cac
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: thu sac ky ((nang xa) or (nang ma)) hoi. hieu ve cao truc va nhan vien cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky ((nang xa) OR (nang ma)) hoi. hieu ve cao truc va nhan vien cua tu.
• Adding a wildcard symbol may retrieve word variants: thu sac ky ((nang xa) or (nang ma)) hoi. hieu ve cao truc va nhan vien cua tu*.