Perhaps you should try some spelling variations:
phan viec » phan viet, nhan vien, phan kien
thu sac » thu sach, thu xac, thu dac
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
thu san » thuy san, thu ban, phu san
va cao » va cac, va co, va dao
luc va » tuc va, loc 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 sac) OR (thu san)) ky lang xa hoi. hieu va cao ((duc va) or (luc va)) phan viec cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sac) OR (thu san)) ky lang xa hoi. hieu va cao ((duc va) OR (luc va)) phan viec cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sac) OR (thu san)) ky lang xa hoi. hieu va cao ((duc va) or (luc va)) phan viec cua te".
• Adding a wildcard symbol may retrieve word variants: ((thu sac) OR (thu san)) ky lang xa hoi. hieu va cao ((duc va) or (luc va)) phan viec cua te*.