Perhaps you should try some spelling variations:
thuc dan » thuc vat
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
hang vi » hang va, hanh vi, hang di
te sach » toc sach
sach ly » sach y, sach lo, sach ty
cao hoi » cau hoi, co hoi, cao hoc
ly nang » ky nang, ly hang, ly vang
vi cua » vai cua, di cua
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: te sach ly nang cao hoi. hieu van pham ((((thuc dan) OR (thuc hanh))) or (hoc dan)) hang vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang cao hoi. hieu van pham ((((thuc dan) OR (thuc hanh))) OR (hoc dan)) hang vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang cao hoi. hieu van pham ((((thuc dan) OR (thuc hanh))) or (hoc dan)) hang vi cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ly nang cao hoi. hieu van pham ((((thuc dan) OR (thuc hanh))) or (hoc dan)) hang vi cua te*.